Bitcoin ETFs posted fresh net inflows on March 30, with total net additions reaching $69.44 million, according to SoSoValue Crypto data. ARK 21Shares' ARKB led the group, bringing in $33.03 million in a single day, followed by Fidelity and BlackRock. Ether ETFs also saw net inflows, totaling $4.96 million. Fidelity's FETH drew $10.56 million of inflows.

Spot Bitcoin ETFs logged a combined net inflow of $69.59 million on March 30, according to data cited by Trader T (@thepfund). Ark's ARKB led the gains with $33.03 million in net subscriptions, followed by Fidelity's FBTC at $28.89 million and BlackRock's IBIT at $7.67 million. Other spot Bitcoin ETFs posted no net inflows or outflows on the day.

Bitcoin held above $67.7K as former U.S. President Donald Trump urged an end to the U.S.-Iran conflict without reopening the Strait of Hormuz. Oil prices eased, while $BTC remained steady amid ceasefire efforts. Markets priced in a modest reduction in geopolitical stress, though risks in the region persist. More details in the comments.

Nakamoto Inc., led by David Bailey, sold 284 Bitcoin in March for roughly $20 million, according to the company's 10-K filing. The average sale price was about $70,422 per Bitcoin.

Nakamoto, a company that manages a corporate Bitcoin treasury, sold $20 million worth of BTC and booked an estimated 40% loss on the position.

Quantum computers may be able to break the cryptography behind Bitcoin sooner than many investors expect, according to a Monday blog post and newly published whitepaper from Google's Quantum AI team. The researchers argue the resources needed to attack Bitcoin's security could be materially lower than past assumptions, reviving questions about how quickly quantum risks could shift from theoretical to practical. In the paper, Google's team estimates that compromising the cryptographic schemes used by Bitcoin and Ethereum could take fewer than 500,000 physical quantum bits (qubits), far below the "millions" often cited in recent years. Google has previously flagged 2029 as a potential inflection point for useful quantum systems, and has said migration efforts need to happen before then, making the lower resource estimate more consequential. Google also proposes two attack approaches that would require roughly 1,200 to 1,450 high-quality qubits. The team says that is only a fraction of earlier projections and suggests the distance between current hardware and a credible attack may be smaller than commonly believed. The research focuses on a real-time threat model rather than older wallets. When a user sends bitcoin, the public key is briefly revealed. A sufficiently fast quantum machine could use that public key to derive the private key and redirect the funds. Under Google's model, an attacker could precompute part of the work, then finish the attack in about nine minutes once a transaction appears. With Bitcoin transactions typically taking around 10 minutes to confirm, the paper estimates an attacker would have about a 41% chance of beating the original transfer. Faster-confirming networks such as Ethereum may be less exposed to this specific window. The paper also estimates roughly 6.9 million bitcoin—about one-third of total supply—are already held in wallets where the public key has been exposed in some way. That includes around 1.7 million bitcoin from Bitcoin's early years and coins affected by address reuse. The estimate is well above a recent CoinShares view that only about 10,200 bitcoin are concentrated enough to significantly move markets if stolen. Google's findings also put fresh scrutiny on Taproot, Bitcoin's 2021 upgrade. Taproot improved privacy and efficiency, but it also made public keys visible on-chain by default, removing a protection layer present in older address formats. The researchers say that design choice could broaden the set of wallets vulnerable to future quantum attacks. On disclosure, Google said it avoided publishing step-by-step instructions for breaking crypto systems. Instead, the team used a zero-knowledge proof to demonstrate the results are valid without revealing the underlying method, allowing independent verification while limiting misuse. For investors, Google's message is not that quantum computers are about to crack crypto tomorrow, but that the timeline may be shorter—and the scope of risk wider—than previously assumed.

A new whitepaper from Google Quantum AI estimates that about 6.9 million Bitcoin (BTC) could be exposed to future quantum "at-rest" attacks once quantum computers become sufficiently capable. The report says roughly 1.7 million BTC remains locked in legacy Pay-to-Public-Key scripts, where the public keys are permanently visible on-chain. The stash includes coins widely believed to be associated with Bitcoin's pseudonymous creator, Satoshi Nakamoto. No quantum system today can carry out such an attack. Google cautions that once the needed capability exists, these long-dormant holdings could be compromised without any new transaction being broadcast: an attacker could derive the private key directly from public blockchain data. The researchers add that a superconducting quantum computer could derive a Bitcoin private key in about nine minutes, narrowly within Bitcoin's average 10-minute block interval. Google describes the exposed supply as a "fixed, multibillion-dollar target" if protocol changes are not implemented in time. The paper also suggests governments explore legal frameworks for "digital salvage," treating dormant quantum-vulnerable coins similarly to unclaimed sunken treasure to keep them from being captured first by rogue states or criminal groups.

SoSoValue data show that on March 30 (ET), U.S. spot Bitcoin ETFs recorded total net inflows of $69.44 million. U.S. spot Ether ETFs reported total net inflows of $4.96 million.

Bitcoin spot ETFs posted a combined net inflow of $69.44 million on March 30 (U.S. Eastern Time), according to SoSoValue data cited by ChainCatcher. ARKB, the spot Bitcoin ETF run by Ark Invest and 21Shares, recorded the largest one-day net inflow at $33.03 million, bringing its cumulative net inflows to $14.33 billion. Fidelity's FBTC ranked second with $28.89 million in net inflows for the day; its cumulative total stands at $11.016 billion. Total net asset value across Bitcoin spot ETFs is $85.475 billion as of the latest update. The ETF net asset ratio—market value as a share of Bitcoin's total market capitalization—is 6.41%, while cumulative net inflows since launch have reached $56.004 billion.