If bitcoin and Ethereum had been invented on the same day, nobody would have heard of bitcoin. I sold every bitcoin Bit Digital held and deployed the proceeds into Ethereum. I have built one of the largest corporate Ethereum treasury positions in the world and said, on the record, that we will never sell it. People have asked me to articulate the single strongest argument for that conviction. On March 30, 2026, that argument arrived. Last month, Citi confirmed it.

In a research note published on May 18, Citi analysts warned that quantum computing advances have shortened the timeline for practical attacks on digital assets, and reached a conclusion that should give every institutional bitcoin holder pause: bitcoin faces significantly greater quantum risk than Ethereum, and the gap between them comes down not just to technology but to governance.

That finding echoes the landmark paper released in late March by Google Quantum AI in collaboration with Stanford University and the Ethereum Foundation, which found that the computing resources required to break bitcoin’s foundational cryptography are approximately 20 times lower than previously estimated. A sufficiently advanced quantum computer, operating with fewer than 500,000 physical qubits, could derive a bitcoin private key from its public key in roughly nine minutes. That machine does not exist today. But the window to act responsibly is narrowing faster than most institutions realize. When Google raises the alarm, and Citi confirms it in the same quarter, this is no longer a fringe concern. This is the silver bullet. And it points directly at bitcoin.

Why bitcoin is exposed

Bitcoin’s security rests on elliptic curve digital signature algorithms. When you spend bitcoin, your public key is briefly exposed onchain. Under classical computing, reversing that to obtain a private key is infeasible. Quantum computers running Shor’s algorithm can, in principle, do exactly that during the brief window a transaction is broadcast. The Google paper doesn’t merely confirm this theoretically; it quantifies it with a precision that removes comfortable ambiguity.

Nic Carter, co-founder of Coin Metrics and one of the sharpest minds in digital assets, has been sounding this alarm for months. In a series of essays beginning in October 2025, Carter called quantum computing “the biggest long-term risk to bitcoin’s core cryptography” and accused developers of “sleepwalking towards collapse.” He estimates a quantum computer could meaningfully break elliptic curve cryptography as early as 2028. Approximately 6.9 million BTC could be vulnerable at a sufficient quantum scale, including legacy wallets and Taproot outputs, which already represented more than 21% of all bitcoin transactions in 2025.

Bitcoin’s governance problem

One might ask: can’t bitcoin simply upgrade? Yes, in theory. In practice, this is where the risk compounds.

Bitcoin’s governance is intentionally conservative and consensus-driven, which makes it extraordinarily slow. SegWit took roughly 8.5 years from conception to widespread adoption. Taproot took approximately 7.5 years. The current quantum proposals, BIP-360 and BIP-361, are still at the draft or early testnet stage as of 2026. A full base-layer transition to post-quantum signatures would be the most contentious change bitcoin has ever attempted. As Carter documented, most bitcoin Core developers have expressed limited concern about urgency, a disposition that is, at minimum, a serious governance liability for any institution holding bitcoin in treasury. A quantum breakthrough does not politely wait for committee consensus.

Ethereum has already acted

This is where the picture diverges sharply. Ethereum’s approach to quantum resistance is not a reactive scramble. It is a structured road map already in execution, built on the NIST post-quantum cryptography standards finalized in August 2024.

The Pectra upgrade, which shipped on Ethereum mainnet in May 2025, introduced EIP-7702, a critical stepping stone toward full account abstraction. Rather than requiring a single network-wide hard fork, Ethereum’s architecture allows individual accounts to choose their own signature verification and switch to quantum-safe signatures voluntarily. The upcoming Hegotá hard fork, planned for the second half of 2026, embeds this further at the protocol level. The Ethereum Foundation has set structured milestones targeting completion of core post-quantum infrastructure by approximately 2029, with active interop devnets already running across multiple clients.

The contrast with bitcoin’s governance paralysis could not be more stark. Ethereum was designed, in ways bitcoin simply was not, to accommodate exactly this kind of foundational upgrade. That is not an accident. It is architecture.

The institutional calculus

For corporate treasurers and sovereign wealth managers, quantum risk is no longer a tail scenario to be footnoted and dismissed. Governments are already treating it as operational. U.S. federal agencies faced an April 2026 deadline to submit post-quantum cryptography transition plans under National Security Memorandum 10. The EU has set a 2030 quantum-resistance target for critical infrastructure. The G7 Cyber Expert Group published a coordinated financial sector road map in January 2026. This compliance architecture will, over time, extend to digital asset treasury holdings.

The question for any institution holding bitcoin is whether they are comfortable with an asset whose quantum-resistance road map is still in draft, whose governance moves at geological speed, and whose developer community is divided on whether urgency is even warranted.

The question for any institution considering Ethereum is whether they want the asset with a structured, transparent, and already in motion upgrade path.

Ethereum is the more adaptive, more capable, and more durable asset. I have put the balance sheet of a Nasdaq-listed company behind that conviction. The Google paper is what finally gives that conviction a single, undeniable, technically grounded answer to the hardest question in digital asset treasury strategy: which asset is built to last?

Ethereum is not a perfect asset. No asset is. But in the context of quantum risk, it is the asset whose architecture was built to survive what is coming. If Carter and Google are right, that distinction will matter enormously, and sooner than most people expect.

TLDR

• RippleX launched the XRP Ledger AI Starter Kit on June 10.
• The kit enables autonomous payments for AI agents on XRP Ledger.
• XRPL now supports the X402 protocol for web-based software payments.
• AI agents can pay for APIs, model inference, and digital services using XRP and RLUSD.
• Ripple-backed startup t54 helped integrate XRPL into X402.

Ripple Labs moved to link blockchain payments with the fast-growing AI economy through a new developer release. The company introduced the XRP Ledger AI Starter Kit on June 10 to support autonomous transactions. The rollout aligns with efforts to connect software agents with direct web payments.

XRP Ledger integrates X402 for autonomous web payments

RippleX launched the XRP Ledger AI Starter Kit to help developers build agent-powered applications. The first phase supports tools that enable autonomous payments on the XRP Ledger network. RippleX said the network design supports fast settlement and predictable costs.

“The XRP Ledger was built with many of these qualities in mind,” the announcement stated. It added that agentic payments now require speed and low transaction fees. The release supports X402, an open protocol that enables software to send payments without human approval.

Through support from t54, XRPL now operates as a supported chain on X402. Ripple backed t54 during a seed funding round to expand payment infrastructure. As a result, AI agents can use XRP and RLUSD for web-based transactions.

The system allows AI agents to pay for API calls and model inference services. It also enables payments for other digital services across web platforms. Developers can integrate these features into applications that require automated billing.

The starter kit also provides tooling for AI coding agents. A dedicated Model Context Protocol server supports queries to XRPL documentation. Clients, including Claude Code, Claude Desktop, and Cursor, can access the documentation directly.

XRP and RLUSD power Mastercard’s agent payment framework

The launch occurred on the same day Mastercard Inc. introduced Agent Pay for Machines. Mastercard designed the framework to support autonomous payments across digital services. More than 30 partners joined the initiative, including Ripple and t54.

RippleX senior vice president Markus Infanger outlined the role of XRPL and RLUSD. He said the network provides a settlement layer that clears in seconds. He added that the system offers predictable costs and built-in compliance.

“XRPL and RLUSD give Mastercard’s framework a settlement layer that clears in seconds,” Infanger said. He also referenced programmable compliance and a full audit trail. Mastercard listed Ripple as one of the core blockchain partners.

The framework supports high-volume and low-value transactions between software agents. It enables machine-to-machine settlements without manual approval. RippleX confirmed that XRP and RLUSD serve as payment rails within the system.

Ripple Labs continues to expand infrastructure through RippleX initiatives. The XRP Ledger AI Starter Kit now rolls out in stages across developer channels. The company released the tools on June 10, alongside Mastercard’s AP4M framework.

Stand With Crypto UK, representing about 286,000 crypto enthusiasts and professionals, is pressing its network to challenge banks that block or restrict transfers to cryptocurrency exchanges. The campaign cites a UK Cryptoassets Business Council report indicating that 40% of crypto transactions are blocked or restricted by banks, with many restrictions applying to exchanges registered with the Financial Conduct Authority and not accounting for individual customer risk profiles.

The campaign outlines that one exchange recorded nearly £1 billion in declined transfers over a 12-month period, and 80% of surveyed platforms reported an uptick in blocked or restricted transfers. To push the issue forward, Stand With Crypto UK has launched a complaint-tool on its website that auto-generates letters challenging these restrictions; the organization says bank responses will help shape the next steps. Their tagline captures the spirit of the effort: “Your money. Your choice.”

Key takeaways

• According to the UK Cryptoassets Business Council, around 40% of crypto transactions are blocked or restricted by banks in the United Kingdom.
• One exchange reported nearly £1 billion in declined transfers over a year, illustrating the scale of friction for on-ramps and off-ramps.
• Approximately 80% of surveyed exchanges and platforms said they have seen higher rates of transfer blocking or restriction.
• The Stand With Crypto UK tool enables supporters to generate complaint letters to banks, with regulator-facing responses expected to influence the campaign’s next moves.
• Policy context in the UK centers on stabilizing and regulating stablecoins, with ongoing scrutiny of how such assets fit into the domestic financial system.

Bank access under scrutiny and the push for targeted risk controls

The campaign argues that blanket transfer bans hinder access to digital assets and stifle competition in a sector that is increasingly regulated. By urging members to file complaints, Stand With Crypto UK aims to convert anecdotal friction into formal regulatory and industry dialogue. In its public communication, the group emphasizes that many restrictions appear to apply broadly, regardless of a customer’s risk profile or the specific platform involved.

Industry voices calling for risk-based solutions

Industry observers have long warned that broad prohibitions can hamper legitimate crypto activity. In commentary to Cointelegraph, Mark Fairless, CEO of UK clearing bank ClearBank, underscored the need for a risk-based approach to crypto-related payments rather than sweeping blocks across the sector. “Interventions should be targeted and proportionate, as broad blocks risk undermining competition and the ability of regulated firms to operate effectively in the UK,” Fairless said.

Regulatory backdrop: UK stablecoins and the broader digital asset framework

The Stand With Crypto UK initiative arrives amid a wider regulatory effort to shape the UK’s stablecoin regime. In early May, a House of Lords committee examined proposed stablecoin regulations, questioning industry executives about bank-run risks, anti-money laundering controls, and the potential impact on traditional banking. Later in May, the Bank of England signaled a softer stance on proposed caps and reserve requirements as part of its review of the pound-denominated stablecoin framework. The objective is to foster a domestic stablecoin market while limiting risks to bank funding and financial stability; non-dollar stablecoins currently account for a small share of the global market. In June, the Lords committee warned that certain proposed stablecoin requirements could limit the viability of pound-denominated tokens and urged regulators to avoid measures that would hinder sector growth.

Beyond stablecoins, broader digital-asset initiatives are gaining momentum. In May, the central bank floated extending operating hours for settlement infrastructures to support tokenized markets, while the Financial Conduct Authority proposed on June 8 allowing some retail-focused investment funds to allocate up to 10% of their portfolios to crypto exchange-traded products.

What to watch next

As the UK weighs its stablecoin framework and the broader integration of digital assets into mainstream finance, the outcomes of this campaign could influence how banks calibrate risk and how regulators balance access with safety. The coming weeks will clarify whether targeted interventions replace blanket blocks and how exchanges and users adapt to evolving policy expectations.

Stand With Crypto UK is urging its 286,000 members to challenge British banks restricting transfers to cryptocurrency exchanges, arguing that blanket limits on transactions to regulated platforms are restricting access to digital assets.

The new campaign cites a report from the UK Cryptoassets Business Council that found 40% of crypto transactions are blocked or restricted by UK banks. The group argues that many of the restrictions apply to transfers involving exchanges registered with the country’s Financial Conduct Authority and do not account for individual customer risk profiles.

According to the report, one exchange recorded nearly 1 billion British pounds in declined transactions over a one-year period due to bank-side rejections, while 80% of surveyed platforms reported an increase in blocked or restricted transfers.

Stand With Crypto said members can submit complaints through a tool on its website that generates letters challenging transfer restrictions, with responses from banks expected to inform the campaign’s next steps.

“Your money. Your choice.” is the tag line of Stand With Crypto UK’s advocacy campaign.
Source: Stand With Crypto UK on X.com

Mark Fairless, CEO of UK clearing bank ClearBank, told Cointelegraph that banks should take a risk-based approach to crypto-related payments rather than imposing broad restrictions across the sector.

“Interventions should be targeted and proportionate, as broad blocks risk undermining competition and the ability of regulated firms to operate effectively in the UK,” Fairless said.

Related: EU proposes ban on 11 crypto platforms in Russia sanctions push

Stablecoin rules remain focus for UK policymakers

The campaign comes amid ongoing efforts by regulators to develop a UK-wide framework for stablecoins.

At the beginning of May, a House of Lords committee examined proposed stablecoin regulations, with lawmakers questioning industry executives on bank-run risks, anti-money laundering controls and the potential impact of stablecoins on traditional banking.

Later that month, the Bank of England said it was reconsidering proposed caps on stablecoin holdings and reserve requirements as it reviewed its framework for pound-denominated stablecoins.

The review comes as regulators seek to support the growth of a domestic stablecoin market while limiting potential risks to bank funding and financial stability, with non-dollar stablecoins currently accounting for only a small fraction of the global market.

Total stablecoin market cap. Source: DefiLlama

In June, a House of Lords committee said certain proposed stablecoin requirements, including reserve and holding rules, could limit the viability of pound-denominated tokens. The committee urged regulators to avoid measures that could inhibit the growth of the sector while finalizing the country’s stablecoin framework.

Beyond stablecoins, regulators have also advanced broader digital asset initiatives. In May, the central bank proposed extending operating hours for the country’s settlement infrastructure to support tokenized markets, while the Financial Conduct Authority proposed on June 8 allowing certain retail-focused investment funds to allocate up to 10% of their portfolios to crypto exchange-traded products.

Magazine: Does ‘Paper Bitcoin’ mean there’s an unlimited supply of BTC?

For months, Strategy (formerly MicroStrategy) founder Michael Saylor frequently reposted news about DeFi protocols using a variety of tokens and blockchains backed by Strategy’s STRC.

Now that their stablecoins and other yield farming tokens have wobbled, he wants everyone to know he was only sharing news, not endorsements.

STRC is one of Strategy’s stocks. It usually trades near $100 and pays a variable, 11.5% annualized dividend. Due to its high current rate of payouts, DeFi yield farmers find STRC appealing to tokenize through a variety of protocols, proprietary tokens, and blockchains.

Saylor took to social media today to clear up any misunderstanding about his frequent and prominent reposts about these non-bitcoin (BTC) tokens.

In his view, the free publicity he gave them was merely a series of non-endorsement “notifications.”

Saylor isn’t a BTC maximalist by the strictest of definitions. Indeed, despite Bitcoin branding and orange coloring across his company, website, and even attire, Saylor has spoken positively about alternative blockchains such as Ethereum and BNB Chain, so long as their utility improves adoption of BTC or Strategy’s securities like MSTR and STRC.

At altcoin conferences, he acknowledges the work of alternative blockchains in distributing proxies for BTC and Strategy exposure.

The timing is his disclaimer wasn’t subtle. In recent days, STRC-backed stablecoins like apxUSD and sUSDat started trading well below their prior $1 targets. 

Within the last week, the STRC-backed sUSDat on Ethereum traded 9.5% below its $1 target, and apxUSD similarly traded below $0.91.

Both mirrored a crash in STRC, a stock that Strategy tries to keep trading near $100 despite it hitting $90.38 on Friday.

DeFi protocols Saylor ‘notified’ everyone about

In addition to social media reposts, Saylor named DeFi builders himself on stage at the Bitcoin 2026 conference, presenting three projects using STRC powered by a variety of altcoins: Apyx, Saturn, and Hermetica.

For example, Apyx uses DeFi protocols to transform STRC exposure into a type of synthetic dollar, apxUSD.

Saturn does roughly the same through its sUSDat token while another protocol, Pendle, slices STRC-backed tokens into ostensibly stable tokens as well as yield tokens like apyUSD.

Traders then loop their assets to borrow and re-borrow, manufacturing leveraged yields atop STRC that can reach higher than 38%.

Saylor didn’t merely tolerate this machinery, he repeatedly amplified these DeFi projects through reposting “notifications.”

For example, when STRC slipped, Saylor reposted Apyx declaring, “We just bought the $STRC dip.” 

Saylor reposted Saturn touting its increasing STRC exposure.

He reposted Pendle celebrating roughly half a billion dollars in STRC-linked deposits.

Although Saylor claims he never endorsed them, the protocols themselves never hid their devotion.

Indeed, Saturn’s account describes its team as “Disciples of @Saylor” while Strata, another builder in the convoluted stack of STRC-backed DeFi, used Saylor’s own terminology, “The Bitcoin Credit flywheel is spinning.”

Bitcoin extended its post-CPI bounce, reclaiming key ground near the $60,000 to $62,000 zone and trading around $62,400 after a volatile session sparked by the latest US inflation data. The May CPI number came in line with economists’ expectations, helping to cushion a potentially hawkish surprise and lending some support to risk assets as traders recalibrate policy bets.

Prices surged roughly 2.5% intraday, rebounding from earlier declines and testing the longer-term footing of a recovery narrative that has been rattled by shifting inflation dynamics. The move underscored that even when inflation prints register at multi-year highs, the absence of an outsized surprise can still catalyze meaningful bullish reversals in bitcoin and other risk-on assets. Economists had anticipated a 4.2% headline CPI for May, with the print matching that forecast and easing the urgency for immediate policy tightening chatter from the Federal Reserve. This interpretation drew on coverage from major outlets, including Reuters, which highlighted that the reading aligned with market expectations.

Key takeaways

• May CPI rose 4.2% year over year, with a 0.5% monthly increase; core CPI rose 2.9% year over year and 0.2% month over month, according to the report.
• Bitcoin, after dipping earlier in the session, rose about 2.5% to around $62,410, reclaiming the critical support band near the 200-week moving average and the $60,000–$62,000 region.
• The price action suggests a potential near-term relief rally, but the chart remains complicated by ongoing resistance near key moving averages and a bear-flag setup on shorter timeframes.
• A downside scenario points to a target near $57,800 if BTC breaks below the flag’s lower boundary, while a bullish breakout beyond resistance could open a path toward the $64,000–$68,000 area in June, aligning with key Fibonacci retracements.

CPI prints in line with forecasts, shaping market expectations

The May CPI report showed inflation hitting 4.2% year over year, driven in large part by increases in energy and gasoline prices, a consequence of renewed geopolitical tensions that have fed into energy markets. On a monthly basis, headline inflation rose 0.5%, while the core index—stripping out food and energy—advanced 2.9% year over year and 0.2% month over month. The horizontal reading of 4.2% for headline CPI matched economists’ consensus, removing the risk of a hotter surprise that might have forced the Federal Reserve into a more aggressive stance in the near term.

For crypto traders, the data reinforced a familiar dynamic: higher inflation can complicate the inflation/deflation trade, but the absence of an outsized surprise keeps expectations for central-bank policy somewhat flexible. In practical terms, the in-line print reduced the immediate risk of a drastic policy pivot, allowing traders to view BTC’s price as reacting to a more stable macro backdrop rather than reacting to a single, outsized move in the inflation series. As Reuters reported, markets were positioned for the number, and the result aligned with those expectations, helping to support a cautious, risk-on tilt entering the trading session.

Technical setup: bears and bulls contend for near-term control

From a chart perspective, Bitcoin rallied into resistance zones after finding support around the 200-week exponential moving average—a long-term anchor many traders watch for major trend changes. The rebound carried BTC back toward the upper end of a critical zone that has anchored sentiment in prior drawdowns, roughly within the $60,000–$62,000 band. However, the immediate picture on shorter timeframes remains nuanced.

On the four-hour chart, BTC appears to be navigating a bear-flag pattern, a formation that often signals a continuation of a prior downswing if the price breaks below the lower trend line. In this case, the risk is that the bounce could be a pause before the next leg lower rather than the start of a sustained uptrend. If a breakdown occurs, the measured downside target sits near $57,800 in June, representing a roughly 7.6% slide from current levels.

Conversely, a decisive breakout above the flag’s upper boundary and a confluence of resistance near the 20-period and 50-period moving averages could invalidate the bearish setup and open room for additional upside. In that scenario, BTC could push toward the $64,000–$68,000 range in June, aligning with upside Fibonacci retracement levels of approximately 0.236 and 0.318. That path would signal renewed momentum beyond the immediate post-CPI bounce and could attract fresh buying from traders looking to ride a more constructive macro tilt.

What comes next for Bitcoin and the broader crypto market

The trajectory of bitcoin in the weeks ahead will hinge on a mix of macro data, central-bank messaging, and the evolving risk appetite of market participants. With inflation stabilizing at a level that markets had already priced in, traders will be scanning for any shift in the Fed’s communication or new data that could tilt expectations toward tighter or looser policy. In the near term, BTC faces a tug-of-war between the potential for a continued relief rally if the broader market remains constructive and the risk of a renewed test of support if selling pressure intensifies or if risk sentiment cools abruptly.

Investors and builders alike should watch how BTC behaves around the critical levels discussed: a decisive test of the 200-week EMA, a breach of the bear-flag boundaries on shorter horizons, and the ability to establish a sustained move beyond resistance bands. The outcome will not only shape the next leg for bitcoin but could also set a tone for altcoins, risk assets, and capitalization trends across the crypto market.

As the market digests inflation data and looks ahead to the next round of economic releases and policy outlooks, traders should remain prepared for a choppy environment where macro signals and technicals can diverge in the short term.

Readers should monitor ongoing inflation readings, Fed commentary, and critical price levels close to the 200-week EMA and the $60k–$62k zone, as these factors will likely determine whether the current bounce evolves into a broader rally or a continuation of volatility-driven sideways action.

The Coinbase-backed group Stand With Crypto UK called on its 286,000 members to file formal complaints against British retail banks over blanket restrictions on crypto transactions, it announced Wednesday.

The campaign is a demonstration against country-wide bank rules that block or cap customer transfers to exchanges, including those registered with the Financial Conduct Authority (FCA), the group said in a press release. Around 8% of UK adults hold cryptoassets, according to FCA research.

Stand With Crypto based its campaign on data from the U.K. Cryptoassets Business Council’s “Locked Out” report from January 2026. The report surveyed 10 exchanges: Coinbase, Kraken, Uphold, Xapo Bank, Zumo, Wirex, OKX, Luno, Bitpanda and Gemini.

A day after that report went out, a spokesperson for the HM Treasury, the country’s economic and finance ministry, told CoinDesk that government officials expected banks to treat all businesses fairly, including crypto services providers. “We would not expect such licensed firms to be subject to account or transaction restrictions by banking services providers,” a spokesperson said.

The FCA report found that British banks block or delay 40% of all domestic crypto transactions. Over the past 12 months, 80% of these exchanges reported a rise in the number of transfers blocked. One platform reported that banks rejected up to 1 million pounds (more than $1 million) in transactions in a single year.

The banking restrictions fall into two categories, Stand With Crypto UK said. Complete blocks are used by Chase UK, Starling, TSB, Virgin Money and Metro Bank, which stop all transfers and card payments to crypto exchanges. Hard transfer caps are set by Barclays, HSBC, Nationwide, NatWest, Santander and Monzo, which impose strict limits on the money users can transfer.

Last year, U.K.-based trading platform IG also released a damning survey saying millions of people were being locked out of crypto just because of they their banks anti-crypto stance. “Two in five (40%) UK crypto investors have had a payment blocked or delayed by their bank when trying to buy digital assets,” according to the IG report.

Advocates at SWC say these policies apply to everyone regardless of an individual’s actual risk profile. They also said that many of these same banks are hiring digital asset teams and exploring crypto products behind the scenes, making the retail customer blocks anti-competitive.

“People across the UK are being blocked from accessing a legal asset class because banks have chosen to impose blanket restrictions on an entire sector,” said Adriana Ennab, director at Stand With Crypto UK, in a statement. “From today, they are formally telling their banks that these restrictions are unacceptable.”

These blocks run counter to both local rules and the government’s stated plans to make the U.K. a global Web3 hub, SWC said. Under the Payment Services Regulations 2017, banks are obligated to execute payments that meet account conditions. In January 2026, HM Treasury explicitly stated it does not expect FCA-authorized firms to face transaction restrictions from banking providers, adding that firms must be treated fairly.

“The Government has set out a vision to make the UK a global hub for digital assets and Web3,” said Katie Harries, head of policy, Europe, at Coinbase, in a statement. “That vision requires retail participation — where every day people hold and engage with crypto assets. But the banks are choking off the crucial on-ramp from fiat (normal) money into crypto.”