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Crypto Lender BlockFills Halts Withdrawals

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Crypto Lender BlockFills Halts Withdrawals

Contagion fears rise as the Susquehanna-backed lender and trading provider cites liquidity issues.

Institution-focused crypto lender and liquidity provider BlockFills is blocking its clients’ deposits and withdrawals, a move reminiscent of previous crypto downturns.

The Financial Times first reported the development, which comes after BTC reached as low as $60,000 on Feb. 5, a 52% drop from the asset’s all-time high in October.

“In light of recent market and financial conditions, and to further the protection of clients and the firm, BlockFills took the action last week of temporarily suspending client deposits and withdrawals. Clients have been able to continue trading with BlockFills for the purpose of opening and closing positions in spot and derivatives trading and select other circumstances,” the company said in a statement earlier today.

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While details are scarce, some consider the move reminiscent of 2022, when large crypto lenders and exchanges that proved insolvent followed a similar process.

The BlockFills representative who spoke with FT cited platform liquidity as an issue and stated in the article that “Management has been working hand in hand with investors and clients to bring this issue to a swift resolution and to restore liquidity to the platform.”

BlockFills is an institution-focused trading platform and crypto lender based in Chicago that recorded $60 billion in trading volume in 2025 and is backed by a crypto-native private equity firm, Susquehanna.

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XRP Spot ETF Hits 11-Week Inflow Record

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XRP Spot ETF Hits 11-Week Inflow Record

XRP spot ETFs recorded $17.11 million in net inflows on April 15, their largest single-day intake in nearly 11 weeks, as four consecutive days of positive flows pushed combined assets under management above $1.25 billion.

Summary

  • XRP spot ETFs drew $17.11 million on April 15, the strongest single-day inflow since February 3, 2026, bringing a four-day total to $38.86 million.
  • Combined US-listed XRP ETF assets under management crossed $1.25 billion as the token rallied 6% to $1.42 on Thursday, reclaiming fourth place by market cap.
  • Analysts say the CLARITY Act roundtable and Ripple’s new tokenized bond pilot with Kyobo Life are adding regulatory and utility tailwinds behind the inflow surge.

XRP (XRP) spot ETFs logged their largest single-day inflow in nearly 11 weeks on April 15, with $17.11 million flowing into US-listed products, per SoSoValue data. The figure marks the strongest daily intake since February 3, 2026, and extends an inflow streak to four consecutive sessions for the first time since March.

Over those four days, US-listed XRP ETFs drew a combined $38.86 million, pushing total net assets to over $1.25 billion. XRP itself rose 6% to $1.42 on Thursday, outperforming every other token in the top 10 by market cap.

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The timing aligns with a broader improvement in crypto market sentiment driven by US-Iran ceasefire diplomacy and easing macro risk. XRP specifically has been benefiting from additional catalysts beyond the macro backdrop.

The SEC’s CLARITY Act roundtable, which kicked off in Washington today, is being closely watched by the XRP community as it could clarify the regulatory treatment of digital assets used in payments, an area where XRP has direct exposure. The prospect of legislative progress has brought institutional buyers back to the ETF market.

Ripple’s announcement on April 14 of a tokenized government bond pilot with South Korea’s Kyobo Life Insurance also reinforced XRP’s real-world settlement utility, adding a fundamental narrative alongside the technical inflow momentum. XRP ETFs posted a record $119.6 million across global products the week ending April 11, driven largely by European buyers, before Wednesday’s US-led single-day surge reset the domestic record.

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What Analysts Are Watching

XRP remains roughly 23% below its January 2026 high despite Thursday’s rally. Analysts say the $1.60 level, which aligned with XRP’s March 17 high, is the first meaningful resistance test. A sustained hold above $1.40 is needed to avoid a false breakout reading on the chart.

The four-day inflow streak is constructive because XRP’s exchange supply has dropped to multi-year lows, meaning ETF accumulation is absorbing tokens from an already thin exchange order book. When ETF demand meets low exchange supply, price elasticity tends to increase on the upside.

XRP price has rallied 6% to $1.42 with its market cap moving back above $87 billion, with further upside contingent on clarity from today’s SEC roundtable and continued ceasefire progress reducing the macro headwinds that have kept risk assets pressured since February.

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Bitcoin’s Quantum Migration May Reveal Number of Satoshi Coins: Adam Back

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Bitcoin's Quantum Migration May Reveal Number of Satoshi Coins: Adam Back

Blockstream CEO Adam Back said Thursday that a future post-quantum migration of Bitcoin could help clarify how many coins linked to Satoshi Nakamoto remain accessible, because any owner wanting to protect vulnerable holdings would need to move them to a new address format.

Speaking at Paris Blockchain Week, Back said such a migration would likely give users ample time to move funds and argued that coins left unmoved after that process could reasonably be treated as lost.

“This migration to post-quantum address format may tell us how many of those coins [Satoshi] still has,” said Back, adding that the pseudonymous creator has an estimated 500,000 to 1 million Bitcoin (BTC).

Satoshi’s Bitcoin stash has ignited heated debate among Bitcoin holders concerned by the quantum computing threat. On Wednesday, Jameson Lopp and five co-authors published a Bitcoin Improvement Proposal aimed at restricting the future movement of coins held in quantum-vulnerable address formats, including older coins whose public keys have already been exposed.

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Adam Back, keynote speech at Paris Blockchain Week in 2026. Source: Cointelegraph

Blockchain data platform Arkham estimates that Nakamoto-linked wallets hold 1.09 million Bitcoin, currently valued at $81.6 billion.

Related: Bernstein says Bitcoin market already priced in quantum risk

Back sees long runway on quantum

Back said Bitcoin developers and holders still have substantial time to prepare, arguing that a quantum breakthrough capable of threatening Bitcoin signatures is at least 20 years away.

He argued that today’s quantum computers are “less powerful than a $5 calculator” and that some of their issues become more pressing as these systems scale, such as their energy consumption.

Back said that runway should give developers and users ample time to develop a post-quantum path and migrate to a new quantum-resistant standard underpinned by hash-based signatures.

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Hash-based signature schemes for Bitcoin, research paper. Source: Blockstream Research

In December 2025, Back’s Blockstream Research released a paper proposing a hash-based signature scheme that offers a “promising path for securing Bitcoin in a post-quantum world,” as a quantum-safe replacement for the ECDSA and Schnorr signatures. Under the proposal, security would rely solely on hash function assumptions, similar to the ones currently used in Bitcoin’s network design.

The Elliptic Curve Digital Signature Algorithm (ECDSA) uses elliptic-curve cryptography to verify the authenticity and integrity of a message. Schnorr signatures are another signature scheme praised for enhancing privacy and reducing data size, due to their ability to combine multiple signatures into one.

Magazine: Bitcoin vs. the quantum computer threat — Timeline and solutions (2025–2035)