Moneyflip CEO Marcos Arturo Kleiman Tronllan faces a federal murder-for-hire charge after allegedly paying undercover agents $40,000 to kidnap and kill a businessman over an unpaid debt.

Moneyflip CEO arrested in Miami

Homeland Security Investigations agents arrested Kleiman in Miami on July 30 in connection with a federal complaint filed in San Diego.

Kleiman, 40, is a Mexican citizen and lawful permanent resident of the United States. He previously lived and worked in San Diego, according to the U.S. Attorney’s Office for the Southern District of California.

Moneyflip is a registered money services business offering cross-border currency exchange services. Kleiman previously operated the company as MXN Financial LLC before it changed its name to Moneyflip LLC in 2025.

Investigators began examining Kleiman while investigating currency exchange businesses in San Diego and Imperial counties. Authorities suspected that he used cross-border transactions to avoid Bank Secrecy Act reporting requirements and launder proceeds from drug sales.

The complaint contains allegations rather than proven facts. Kleiman is presumed innocent unless convicted.

Undercover agents converted $750K into crypto

Undercover HSI agents approached Kleiman in February and asked him to convert U.S. dollars into cryptocurrency. The agents allegedly told him that the money came from drug sales.

Prosecutors said Kleiman created an email account and shared its password with the agents. The parties allegedly communicated through unsent draft emails to avoid transmitting messages directly.

Kleiman then allegedly converted approximately $750,000 into cryptocurrency and arranged for the assets to be transferred to an undercover agent’s wallet. Authorities said he charged a 10% fee.

“Kleiman converted approximately $750,000 of United States currency into cryptocurrency and caused the transmission of those crypto coins into an undercover federal agent’s wallet,” prosecutors said.

During those discussions, Kleiman allegedly asked whether the agents could recover a debt from a Mexican businessman and kill him. Prosecutors said he agreed to pay $40,000 for the kidnapping and murder, including two $5,000 advance deposits.

Agents staged murder before 25,000 USDT payment

Kleiman allegedly arranged for a third party to deliver the first $5,000 deposit to an undercover agent in San Diego in May. Prosecutors said he later paid another $5,000 deposit after an agent requested money to reserve the purported killers.

On July 28, the undercover agents showed Kleiman three photographs and a video that falsely depicted the businessman as having been captured, tortured and killed. No murder occurred as part of the operation.

Authorities said Kleiman responded that the agents could count on him to complete the payment. On July 29, he allegedly delivered another $5,000 in cash and transferred approximately 25,000 USDT to an undercover cryptocurrency wallet.

USDT is a dollar-pegged stablecoin issued by Tether. Unlike cash, transfers made through public blockchain networks can leave transaction records that investigators may use alongside messages, surveillance, and other financial evidence.

Federal charge carries a 10-year maximum sentence

Kleiman faces one count of murder-for-hire under Title 18, Section 1958(a) of the U.S. Code. The charge carries a maximum sentence of 10 years in federal prison and a fine of up to $250,000.

The case is being prosecuted by Assistant U.S. Attorneys Michael Deshong and Christopher Beeler. HSI led the investigation with support from the U.S. Postal Inspection Service, Drug Enforcement Administration, Customs and Border Protection, IRS Criminal Investigation, and local law enforcement agencies.

Money services businesses that exchange or transmit convertible virtual currencies may fall under federal Bank Secrecy Act requirements. Registration as a money services business does not represent government approval of a company or its activities.

A Hong Kong woman reportedly lost around $3.3 million after an online romantic partner directed her to a fraudulent cryptocurrency investment platform.

Crypto romance scams cost victims nearly $9M

Hong Kong authorities recorded 25 investment fraud cases involving online romantic relationships during the week ending July 30, according to police statistics cited by Binance Square News.

The reported losses totaled nearly HK$70 million, or roughly $9 million. One case accounted for more than a third of that amount.

A 50-year-old insurance professional reportedly met a person online who presented himself as a car dealer. After establishing a romantic relationship, the person persuaded her to invest in virtual currencies through an unfamiliar platform.

The victim continued transferring money after the platform displayed rising account balances. By last month, it claimed that her portfolio had generated returns exceeding 800%.

However, the platform denied her withdrawal request. The purported romantic partner and an alleged investment adviser then stopped responding, leaving the woman with cumulative losses exceeding HK$26 million or around $3.3 million.

Authorities did not disclose which cryptocurrencies were involved or whether any of the transferred funds had been recovered.

Fake profits kept the victim investing

The case follows a common pattern in relationship-based cryptocurrency fraud. Scammers first build trust through dating applications, social media or messaging services before introducing an investment opportunity.

Victims are then directed to trading websites or applications controlled by the fraudsters. These platforms may display fabricated profits, allow a small initial withdrawal, or encourage victims to increase their deposits.

The scheme typically becomes apparent when a victim attempts to withdraw a larger amount. Operators may block the transaction or demand additional payments described as taxes, processing charges or penalties.

Hong Kong police urged investors to treat investment recommendations from newly established online contacts with caution. Warning signs include guaranteed returns, unusually high profits and requests to transfer funds through an unfamiliar platform.

The FBI describes the same method, saying criminals control the supposed investments and often steal all funds deposited by victims.

Hong Kong employment scams also surged

The romance cases add to a wider increase in online fraud affecting Hong Kong residents.

Police recorded 2,148 online employment scams between January and May 2025, up 92.1% from the same period a year earlier, according to figures reported by the South China Morning Post and HRD Asia.

Reported losses increased from HK$260 million to HK$480 million, an 89% rise. Authorities registered 621 cases in May alone, with 60% originating on WhatsApp and another 22% on Telegram.

Investigators attributed much of the increase to “click farming” schemes. Fraudsters initially pay participants small commissions for completing simple online tasks, such as following social media accounts or purchasing products to inflate a seller’s activity.

After gaining trust, scammers ask victims to commit larger sums for higher-paying assignments. Withdrawal attempts are then rejected, with operators claiming the victim made an error or damaged a company system and must pay a penalty.

US crypto fraud losses reached $7.2B

Similar investment schemes remain a major threat to US users. Cryptocurrency investment fraud produced $7.2 billion in reported US losses during 2025, making it the country’s largest category of financial loss reported to the FBI’s Internet Crime Complaint Center.

The FBI’s 2025 report said scammers commonly approach victims through social media, dating platforms and unsolicited messages before moving conversations to private messaging services.

US authorities advise victims to stop sending money immediately and preserve wallet addresses, transaction hashes, platform domains and communications. The FBI also warns against paying supposed recovery services, which may operate a second scam targeting people who have already lost funds.

Hong Kong police similarly advised users not to lower their financial safeguards because of emotional attachment or trust. Investors should independently verify platforms and avoid offers promising guaranteed or abnormally high returns.

XRP Ledger developers are preparing five proposed amendments for the upcoming xrpld 3.3.0 release, targeting privacy, atomic settlement, and easier institutional onboarding.

XRP Ledger v3.3.0 targets institutional transactions

Jazzi Cooper, head of product at RippleX, outlined the proposed changes in a post on X. The xrpld 3.3.0 release is anticipated next week, although releasing the software will not immediately activate its amendments.

“XRPL has already proven it can support tokenized assets at scale. Now it’s time to put these assets to use: global transfers, trading, collateralizing, and settling,” Cooper said.

She added that the five amendments would move the network closer to supporting those activities. The proposals cover confidential token transactions, transaction batching, delegated permissions, sponsored costs, and adjustable token properties.

Each amendment must pass through the XRP Ledger’s validator-governed approval process. Amendments affecting transaction processing generally need at least 80% support from trusted validators for two consecutive weeks before taking effect.

The upgrade follows the activation of fixCleanup3_2_0 on July 29. XRPScan data showed that the amendment received support from 30 of 35 participating trusted validators, equivalent to 85.71%.

Its activation made version 3.2.0 the minimum software release compatible with the updated mainnet rules. Nodes running version 3.1.0 or earlier became amendment-blocked and could no longer follow validated ledgers correctly.

Confidential MPT would add token privacy

Confidential MPT would add native privacy features for Multi-Purpose Tokens on XRPL. The proposal uses elliptic-curve encryption and zero-knowledge proofs to conceal token balances and transfer amounts while allowing authorized verification.

Issuers and holders could keep transaction data private from the public while granting access to a designated third party, such as an auditor or regulator. The arrangement is intended to balance commercial confidentiality with institutional reporting and compliance requirements.

“For financial institutions, privacy is often a prerequisite for using public blockchain infrastructure,” Cooper said.

The proposal could be relevant to US-regulated institutions evaluating public blockchains for tokenized assets. Banks, broker-dealers and asset managers often need transaction confidentiality while retaining records that can be reviewed by auditors or regulators.

However, the amendment would represent a network-level technical function, not regulatory approval for any specific financial product or activity.

Batch and delegated permissions support settlement

The proposed Batch amendment would allow transactions involving multiple accounts to execute atomically within one ledger. Either every part of the batch would succeed, or the entire operation would fail.

The structure can support delivery-versus-payment, where the transfer of an asset and its corresponding payment occur together. It could also reduce settlement risk in more complicated workflows involving several accounts or assets.

Permission Delegation would allow an account holder to grant narrowly defined transaction permissions without transferring control of the account’s signing authority. An institution could therefore authorize a treasury or operations team to perform specific tasks while keeping its issuance keys under separate control.

Sponsored Fees and Reserves would address another onboarding issue by allowing a bank, issuer, or platform to cover transaction fees and account reserves for users.

“Users continue to own their accounts and keys, while removing one of the biggest onboarding hurdles: requiring every participant to acquire and manage XRP before they can interact with the network,” Cooper said.

Dynamic MPT would make issued tokens adjustable

Dynamic MPT, the fifth proposed amendment, would let issuers modify selected token properties after issuance. Adjustable fields could include transfer fees, metadata, and other predefined features.

Issuers currently may need to create a replacement token when important terms require changes. Dynamic MPT is intended to provide limited flexibility without requiring an entirely new issuance, although the final amendment specifications will determine which properties can be changed.

The proposed features arrive as XRPL records increased tokenized real-world asset activity. RWA.xyz data showed that the network added approximately $2.6 billion in RWA value during the six months through July 26, excluding stablecoins.

That ranked XRPL second among tracked networks for net RWA inflows, behind BNB Chain at about $3 billion and ahead of Stellar at roughly $2.1 billion. XRPL’s combined distributed and represented RWA value reached approximately $4.38 billion.

Validator operators will be able to review the amendments as their specifications become available. Activation will depend on whether each proposal independently secures the required consensus after xrpld 3.3.0 is released.

Validators (entities that supply their resources to run and maintain a network) were advised to reject it, and an emergency server release marked it unsupported to prevent activation. No funds were lost, because it never reached the main network.

Permission Delegation, which lets an institution grant another account narrowly scoped authority without handing over full signing power, was disclosed as vulnerable in September 2025 and disabled.

The bug allowed one account to charge transaction fees to another and potentially drain its balance. The ledger’s documentation has listed both amendments as obsolete since, to be replaced by revised versions.

The other three are new. Confidential MPT combines zero-knowledge proofs, which let someone prove a statement is true without revealing the underlying data, with elliptic-curve encryption, so that balances and transfer amounts on Multi-Purpose

Tokens stay private while auditors or regulators can still verify them when required.

Sponsored Fees and Reserves lets a bank or platform cover another account’s XRP fees and reserve requirement, removing the need for every user to acquire XRP before transacting.

Lastly, Dynamic MPT lets an issuer specify at creation which token properties can be changed later, avoiding a full migration to a new token when fees or metadata need updating.

Every step of that runs on the attacker’s machine. The victim’s device is not involved at any point and could be powered off in a safe on another continent.

Galaxy’s breakdown shows the process running. Of the drained wallets, 1,183 used the modern native segwit address format, seven used an older standard and six an older one still. Nobody targets a specific victim across three address formats at once.

That is systematic enumeration, checking each candidate seed against every path it might have produced. The operator can widen the search, refine it and return whenever they choose.

Galaxy warned further waves are likely if owners do not move their funds.

Nor can an owner determine whether they are exposed. There is no test to run against your own wallet that reveals whether your seed sits inside the reproducible range.

Attack might not be fully finished

Coinkite, Coldcard’s maker, has warned Mk3 owners and says its newer devices are unaffected, while Block’s report places the Mk2, Mk4, Q and Mk5 in scope as well. Until that is resolved, anyone who generated a seed on the affected firmware has to assume the worst rather than verify it.

The attacker did make one mistake, however.

Block’s Clay Garrett said on X that the operator used a paid account at a “well-known blockchain data provider” to query the source addresses during the sweeps, and that the provider’s internal logs matched the suspected workflow with what he called extraordinary specificity, down to the number, timing and sequence of requests.

Every twelve seconds, the Ethereum network asks a question that would have seemed absurd before 2022: who gets to write the next page of a $400 billion ledger, and how do you stop them from lying? The answer, for Ethereum and the majority of active blockchains by market value, is proof of stake, a consensus mechanism that replaced the energy-intensive puzzle-solving of proof of work with a simpler, older idea: put your money where your mouth is. Validators lock cryptocurrency as collateral, propose and verify blocks, and face the destruction of their deposit if they cheat. No mining rigs, no electricity arms race, no warehouse full of ASICs. Just capital at risk and code that enforces the consequences.

The idea predates crypto itself. Traditional finance has always understood that people with money on the line behave differently from people without it. Margin requirements, performance bonds, insurance deposits – the financial system is built on collateral as a behavior constraint. Proof of stake applied the same logic to distributed consensus: instead of proving you spent electricity (proof of work), you prove you have wealth locked up that the protocol can destroy if you misbehave. The mechanism was first described in a 2012 Peercoin whitepaper by Sunny King and Scott Nadal, spent a decade in Bitcoin’s shadow while proof of work dominated the conversation, and then became the consensus mechanism of choice for virtually every major blockchain launched after 2020. Ethereum’s adoption of it in 2022, the single largest infrastructure migration in crypto’s history, settled the debate about whether proof of stake could secure serious money. It can. It does. And the questions that remain are not about whether it works, but about the particular ways it concentrates, centralizes, and regulates differently from the mechanism it replaced.

The core mechanism: how validators replace miners

In proof of work, security comes from physical scarcity: miners burn electricity to find a hash that satisfies the network’s difficulty target, and the cost of that electricity is what makes attacks expensive. The security guarantee is thermodynamic. You cannot fake the work because the work is physics.

Proof of stake replaces this with economic scarcity. Instead of burning electricity, validators deposit tokens, their stake, into a smart contract controlled by the protocol. This stake serves three purposes simultaneously: it is the validator’s entry ticket (you cannot validate without it), their incentive (correct behavior earns staking rewards), and their punishment (incorrect or malicious behavior triggers slashing, the partial or total destruction of the deposit). The protocol’s security guarantee is economic: attacking the network requires acquiring and risking an enormous amount of the network’s own currency, and a successful attack would destroy the value of the very asset the attacker holds. The mechanism is self-referential by design. The thing securing the network is the thing the network produces, and that circularity is both the mechanism’s elegance and its most debated vulnerability.

The practical difference for the network is dramatic. Proof of work requires specialized hardware running continuously, consuming energy on the scale of a small country. Proof of stake requires a server, a stable internet connection, and the staked capital. Ethereum’s energy consumption dropped by an estimated 99.95% the day it switched, from roughly 78 terawatt-hours per year to the equivalent of a few thousand homes. The environmental argument for proof of stake is settled. The security argument is subtler, and understanding it requires walking through how a block actually gets produced.

The lifecycle of a block under proof of stake

Ethereum’s implementation, the most battle-tested proof-of-stake system by value secured, runs on a twelve-second heartbeat called a slot. Every slot, the protocol selects one validator to propose a block and a committee of validators to attest that the proposal is valid. The selection process uses a pseudorandom algorithm seeded by on-chain data, weighted by stake size: a validator with 64 ETH staked has twice the chance of selection as one with 32 ETH, but the randomness prevents anyone from predicting assignments more than a few minutes ahead.

The proposer assembles a block from the transaction pool, constructs it according to protocol rules, and broadcasts it. The committee members, typically several hundred validators per slot, then independently verify the block: they check that transactions are valid, that the proposer followed the rules, and that the block builds correctly on the chain’s history. Each committee member publishes an attestation, a signed vote that says “this block is valid and extends the chain correctly.” These attestations accumulate, and when enough are collected, the block is considered justified.

Finalization, the point at which a block becomes irreversible, takes longer. Ethereum uses a finality gadget called Casper FFG that finalizes blocks once two-thirds of the total staked ETH has attested to them across two consecutive epochs (each epoch is 32 slots, roughly 6.4 minutes). After finalization, reversing the block would require at least one-third of all staked ETH to be slashed, a cost that currently exceeds $35 billion. This is the concrete security guarantee: the price of rewriting Ethereum’s history is the destruction of tens of billions of dollars of capital.

The fork-choice rule, the algorithm validators use to decide which chain is the “real” one when they see competing versions, is called LMD-GHOST (Latest Message-Driven Greedy Heaviest Observed SubTree). It follows the branch with the most recent attestation weight, meaning the chain that the most stake has most recently voted for wins. Together, Casper FFG and LMD-GHOST create a system where blocks are produced quickly (every 12 seconds), justified within minutes, and finalized within roughly 13 minutes, with finality backed by the full economic weight of staked ETH.

Proof of stake vs proof of work: the real tradeoffs

The debate between proof of stake and proof of work is one of the oldest in crypto, and it is not as settled as either side claims. Both mechanisms solve the same fundamental problem, how to reach agreement in a network where participants do not trust each other, but they do so with genuinely different security models, and those differences produce different failure modes.

Proof of work ties security to the physical world. Mining requires electricity and hardware, both of which have real, external costs that cannot be faked or printed. An attacker needs to acquire 51% of the network’s hash rate, which means outspending the entire existing mining infrastructure. The cost of attacking Bitcoin is, roughly, the cost of all the mining hardware and electricity currently deployed to secure it, a cost that exists regardless of Bitcoin’s token price. This externality, security coming from outside the system, is what proof-of-work advocates consider its fundamental advantage: it anchors the digital to the physical.

Proof of stake ties security to the system’s own token. An attacker needs to acquire roughly one-third of all staked tokens (for finality-breaking attacks) or one-half (for censorship attacks), which means buying an enormous position in the network’s own currency. The attack is self-deterring because the act of attacking would crash the token’s price, destroying the attacker’s own holdings. But the security is circular: the network is secured by its token’s value, and its token’s value depends on the network being secure. Critics argue this creates a reflexivity problem that proof of work avoids. Defenders argue that the economic incentives are strong enough that the circularity is academic rather than practical.

The energy argument is overwhelmingly one-sided. Proof of work networks consume enormous amounts of electricity: Bitcoin alone uses an estimated 150 terawatt-hours per year, comparable to a medium-sized country. Proof of stake networks use a tiny fraction of that. Whether Bitcoin’s energy consumption is “wasteful” or “the cost of decentralized security” is a values question, not a technical one, but the gap in energy use is not debatable.

Hardware centralization cuts differently in each model. Proof of work has centralized around ASIC manufacturers (principally Bitmain) and regions with cheap electricity. Proof of stake centralizes around large token holders and staking service providers. Both mechanisms concentrate influence; they just concentrate it in different places. On Ethereum, Lido controls approximately 28% of all staked ETH as of mid-2026, a concentration that would be alarming in a proof-of-work context and is increasingly alarming in proof of stake as well.

Finality is the clearest practical advantage of proof of stake. Bitcoin transactions are never truly “final” in the mathematical sense; each new block makes reversal harder but never impossible, and merchants conventionally wait for six confirmations (roughly an hour) before considering a payment settled. Ethereum’s proof of stake provides deterministic finality: once a block is finalized by Casper FFG, reversing it requires destroying at least one-third of all staked ETH. The transaction is done, period, within roughly 13 minutes.

Why Ethereum switched: the Merge and what it changed

Ethereum’s transition from proof of work to proof of stake, called the Merge, occurred on September 15, 2022. It was the most complex and consequential upgrade in blockchain history: a live, $200 billion network switched its entire consensus mechanism without downtime, without a chain split, and without losing a single block. The execution was flawless, which tends to make people forget how extraordinary it was.

The Merge had been planned since Ethereum’s earliest days. Vitalik Buterin’s original roadmap always envisioned proof of stake as the endgame; proof of work was an interim measure while the research team, principally Vlad Zamfir and later the Ethereum Foundation’s consensus team, worked out the formal properties of a secure PoS protocol. The Beacon Chain, Ethereum’s proof-of-stake chain, launched in December 2020 as a parallel system running alongside the proof-of-work chain. Validators staked ETH on the Beacon Chain for nearly two years before the Merge merged the two systems into one.

What the Merge changed immediately: energy consumption dropped by 99.95%. Ethereum went from consuming roughly as much electricity as Chile to consuming roughly as much as a small town. Mining ceased entirely. GPU prices dropped as miners sold off their hardware. Ethereum’s environmental narrative reversed overnight.

What the Merge changed economically: issuance dropped by approximately 90%. Under proof of work, Ethereum issued roughly 13,000 ETH per day to miners. Under proof of stake, issuance fell to approximately 1,700 ETH per day to validators. Combined with EIP-1559’s fee-burning mechanism, which destroys a portion of every transaction fee, this made Ethereum’s supply dynamics deflationary during periods of high network activity. More ETH is burned than issued, and the total supply slowly decreases, a property no proof-of-work chain can replicate because miners need revenue to cover their physical costs.

What the Merge did not change: gas fees, transaction speed, and throughput remained the same. The Merge was a consensus-layer change, not an execution-layer change. Scaling improvements depend on layer-2 solutions, Arbitrum, Optimism, Base, and others, that settle batches of transactions on Ethereum’s mainnet. The Merge was a prerequisite for these scaling plans, because future upgrades like danksharding require proof of stake’s validator architecture to process data blobs, but the Merge itself did not make Ethereum faster or cheaper. The common misconception that the Merge would reduce gas fees was one of the most persistent communication failures of the entire project.

The landscape: which blockchains use proof of stake

Proof of stake is no longer an alternative; it is the default. The overwhelming majority of blockchains launched since 2020 use some variant of proof of stake, though the implementations differ significantly in their validator economics, finality properties, and centralization profiles.

Ethereum uses the Casper FFG and LMD-GHOST combination described above, with a minimum stake of 32 ETH per validator (approximately $110,000 at current prices). The high minimum creates a barrier to solo validation that has driven much of the staking volume toward pooling services. As of mid-2026, approximately 33 million ETH is staked, roughly 27% of the total supply, across over 1 million active validators.

Solana uses proof of stake combined with proof of history, a cryptographic clock that timestamps transactions before they enter consensus, enabling the network to order events without validators needing to communicate about sequencing. This architecture allows Solana to process thousands of transactions per second with sub-second finality, though it requires significantly more powerful hardware to validate than Ethereum, which introduces its own centralization pressures. Solana’s validator count is smaller and its hardware requirements higher, a deliberate tradeoff of accessibility for performance.

Cardano runs Ouroboros, a proof-of-stake protocol developed through academic peer review at the University of Edinburgh and IOHK. Ouroboros divides time into epochs and slots, uses a verifiable random function for leader selection, and was the first proof-of-stake protocol to be formally proven secure under a rigorous cryptographic model. Cardano’s approach prioritizes formal correctness over speed, a philosophy that has earned it both respect in academic circles and criticism for slower development velocity.

Polkadot uses nominated proof of stake, a system where nominators back validators with their tokens and share in both rewards and slashing risk. Polkadot’s unique contribution is its relay chain architecture, where a central chain provides consensus and security for multiple application-specific parachains that run in parallel. The staking mechanism secures not just one chain but an entire ecosystem of connected chains.

Cosmos, through its Tendermint BFT consensus engine, pioneered delegated proof of stake with instant finality. Tendermint produces blocks that are final the moment they are committed, with no possibility of reversal, a property that makes it especially suitable for financial applications. The Cosmos ecosystem’s hub-and-spoke model, where independent chains communicate through the Inter-Blockchain Communication protocol, has made it the backbone for dozens of application-specific blockchains, from the Osmosis DEX to dYdX’s order-book exchange.

Avalanche uses a novel consensus protocol based on repeated random sampling: validators poll random subsets of other validators about their preferences, and consensus emerges through the accumulation of confidence, similar to how snowflakes form through repeated crystallization, hence the consensus family’s name: Snowball, Snowflake, Snowman. The approach achieves sub-second finality and high throughput while maintaining a relatively low hardware barrier.

BNB Chain, Binance’s blockchain, uses proof of staked authority, a hybrid where a small set of 21 validators are elected through staking but also meet identity and reputation requirements. This is the most centralized of the major proof-of-stake implementations, trading decentralization for performance and the institutional backing of Binance.

Bitcoin remains the most prominent proof-of-work holdout, and its community has shown no inclination to switch. The Bitcoin argument against proof of stake is philosophical as much as technical: proof of work anchors security to the physical world, and that anchoring is considered a feature that proof of stake cannot replicate. Whether this position will hold indefinitely as the industry standardizes around proof of stake is an open question, but as of 2026, it holds firmly.

The risks validators and stakers actually face

The staking ecosystem has matured enough that its risks are well-documented, and they are not trivial.

Slashing is the mechanism’s enforcement tool: validators who provably violate protocol rules, principally by signing two conflicting blocks or attestations, lose a portion of their staked tokens. On Ethereum, the minimum slashing penalty is 1/32 of a validator’s stake, roughly 1 ETH, but the penalty scales with how many other validators are slashed in the same time period. If a single validator is slashed in isolation, the penalty is modest. If hundreds are slashed simultaneously, suggesting a coordinated attack or a catastrophic infrastructure failure, the penalties escalate toward total stake destruction. This correlation penalty is by design: it punishes systemic threats more than individual mistakes, but it also means that a bug in a widely-used validator client could trigger mass slashing of validators who did nothing individually wrong. The concentration of the validator ecosystem around a few major clients, principally Prysm and Lighthouse on Ethereum, makes this a non-theoretical risk.

Lock-up and unbonding periods vary by network but create real liquidity risk. Ethereum introduced withdrawals in April 2023 with the Shanghai/Capella upgrade, but the withdrawal queue can extend to days or weeks during periods of high exit demand. Other networks impose fixed unbonding periods: Cosmos chains typically require 21 days, Polkadot requires 28 days, and during those windows the staker cannot sell or use their tokens regardless of market conditions. A 28-day lock-up during a market crash is not a theoretical concern; it has happened.

Liquid staking protocols solve the liquidity problem but introduce smart contract risk. When you stake through Lido, your ETH goes into Lido’s smart contracts, and you receive stETH, a liquid token that represents your staked position. This stETH can be used across DeFi: lent, borrowed against, or provided as liquidity. But the arrangement is only as safe as Lido’s contracts. A bug or exploit in a liquid staking protocol could result in the loss of all deposited tokens, and because liquid staking concentrates enormous amounts of stake in single contract systems, the blast radius of such an exploit would be severe. Lido holds roughly $15 billion in staked ETH as of mid-2026; Rocket Pool, the second-largest, holds several billion more. These are among the largest smart-contract honeypots in existence.

Centralization pressure is the most debated long-term risk. On Ethereum, Lido controls approximately 28% of all staked ETH. If Lido’s governance were compromised or its operators coordinated, they could theoretically influence block production or censorship decisions for a significant fraction of the network. The Ethereum community has debated self-imposed caps on liquid staking dominance, and Lido has made governance decentralization changes, but the structural incentive favoring large staking pools, economies of scale, professional operations, integration with DeFi, has not changed. Proof of stake does not inherently centralize, but it centralizes differently from proof of work, and the patterns are already visible.

Validator MEV, the extraction of value from transaction ordering, affects proof of stake validators just as it affected proof-of-work miners, but the dynamics differ. Under proof of work, MEV accrued to miners who could order transactions within blocks. Under proof of stake, MEV accrues to the block proposer for that slot, and the MEV-Boost system, which allows proposers to outsource block construction to specialized builders, has created a sophisticated supply chain around transaction ordering. The relationship between validators, builders, relays, and searchers is complex, and the MEV flowing through this pipeline represents billions of dollars per year, revenue that disproportionately benefits sophisticated operators and further concentrates the staking economy.

Proof of stake and US regulation: where it stands

The US regulatory treatment of proof of stake is fragmented across multiple agencies, each approaching staking through a different lens.

The SEC’s interest in staking crystallized in February 2023 when it charged Kraken with offering unregistered securities through its staking-as-a-service program. Kraken settled for $30 million and shut down its US staking service. The SEC’s theory was that Kraken’s staking program, where users deposited tokens with Kraken and received yield in return, constituted an investment contract under the Howey test: users invested money in a common enterprise with an expectation of profit derived from Kraken’s efforts. The action targeted the service model, not the proof-of-stake mechanism itself, but it sent a clear signal that centralized staking services would face scrutiny. Coinbase challenged a similar SEC action and secured partial judicial skepticism about the SEC’s approach, but the legal landscape remains unsettled.

The tax treatment of staking rewards is the most practically consequential question for individual stakers. The IRS treats staking rewards as ordinary income, taxable at fair market value when received. This creates an immediate tax liability on tokens that may subsequently lose value. In 2023, a Tennessee couple won a partial victory in Jarrett v. United States, where the court accepted their argument that newly created staking rewards, like newly created property, should not be taxable until sold. The IRS refunded the Jarretts’ taxes but has not adopted their reasoning as policy, and the question remains unresolved. The practical implication: most tax advisors still recommend treating staking rewards as income at receipt, because the IRS’s position has not formally changed.

State-level regulation has been more accommodating. Wyoming’s blockchain-friendly legislation explicitly addresses staking as a permitted activity. Several states have introduced or passed legislation recognizing that operating a proof-of-stake validator is distinct from issuing securities. The patchwork of state approaches creates complexity but also creates jurisdictions where staking operations can operate with legal clarity.

The GENIUS Act and other proposed federal legislation may eventually clarify the regulatory framework, particularly around stablecoins and digital asset classification, but as of mid-2026, staking regulation in the US is primarily a product of enforcement actions and court decisions rather than comprehensive legislation. The gap between how the technology works and how regulators categorize it remains wide.

How to stake: the three paths and what each costs

For someone who has decided to stake, the choice comes down to three models, each with a distinct risk-reward profile.

Exchange staking is the simplest entry point. Coinbase, Binance, and other major exchanges offer one-click staking for supported tokens. You deposit your tokens, the exchange handles validator operations, and you receive rewards minus a commission, typically 10-25% of the yield. The advantage is simplicity: no technical knowledge, no hardware, no key management. The disadvantage is custodial risk: your tokens are held by the exchange, which means you are exposed to the exchange’s solvency, security, and regulatory risk. The collapse of FTX in November 2022, where customers lost billions in deposits, is the cautionary tale that hangs over every custodial staking arrangement. Exchange staking yields on Ethereum currently run 2.5-3.5% APR after the platform’s commission.

Liquid staking offers a middle path. Protocols like Lido, Rocket Pool, Jito (on Solana), and others accept deposits and return a liquid receipt token, stETH, rETH, JitoSOL, that represents the staked position plus accumulated rewards. The receipt token can be traded, used as collateral in lending protocols, or deposited into liquidity pools, allowing the staker to earn additional yield on top of staking rewards. This composability is liquid staking’s core advantage: your capital works twice. The risks are smart contract exposure (the protocol’s contracts hold your tokens), oracle risk (the receipt token’s exchange rate depends on accurate price feeds), and the possibility of depegging, where the liquid staking token trades below its theoretical value during periods of market stress, as stETH briefly did during the Three Arrows Capital collapse in June 2022. Liquid staking typically charges a 10% fee on rewards, yielding net returns of roughly 3-3.5% APR for Ethereum.

Solo staking is the gold standard for decentralization and the most operationally demanding option. On Ethereum, solo staking requires depositing 32 ETH (approximately $110,000 at current prices), running a validator node on dedicated hardware or a cloud server with reliable uptime, and maintaining the software through upgrades. The staker earns the full yield, currently around 3.5-4% APR, with no intermediary taking a cut, and keeps full custody of their withdrawal keys. The staker also contributes maximally to network decentralization, because each solo validator is an independent node that makes its own attestation decisions. The barriers are capital (32 ETH is a significant commitment), technical competence (running a validator is not difficult but requires ongoing attention), and responsibility (downtime means missed rewards and minor penalties, and a misconfigured setup risks slashing). Ethereum’s community actively encourages solo staking through resources like ethstaker.cc and various client diversity initiatives, recognizing that the network’s long-term health depends on maintaining a large base of independent validators rather than concentrating stake in a few large operators.

The decision between these paths is ultimately about what risks you are comfortable with. Exchange staking trades custodial risk for convenience. Liquid staking trades smart contract risk for capital efficiency. Solo staking trades operational burden for maximum independence. There is no universally correct choice, only the one that matches a given staker’s capital, technical ability, and risk tolerance, and the honest answer is that most people should start with the simplest option and graduate to more self-sovereign approaches as their understanding and commitment deepen.

Frequently asked questions

Disclaimer: This article is for informational purposes only and should not be considered financial or investment advice.