BlackRock published a report called Quantum Computing and Blockchains this week, and its conclusion cuts against the doom-and-gloom framing that usually surrounds this topic. The world's largest asset manager, overseeing more than $15 trillion, argues that upgrading crypto networks to quantum-resistant cryptography is technically simpler than actually building a quantum computer powerful enough to break them in the first place.
"In our view, PQ migration for cryptocurrencies is eminently addressable from a technical standpoint, and the key challenge is one of timely coordination and implementation," the report states. In other words, the math is solvable. Getting thousands of independent developers and node operators to agree on a timeline is the harder part.
What the numbers actually show
BlackRock flagged two figures that deserve attention. Around 35% of circulating Bitcoin supply carries exposed public keys, making those coins potentially vulnerable to a sufficiently advanced quantum attack. A further 11 to 19% of supply may already be permanently lost, meaning no migration will ever touch those coins regardless of what the network decides. Quantum computers capable of exploiting these weaknesses do not yet exist. Current machines make too many errors to threaten Bitcoin, which remains the largest computing network on the planet.
BIP-360, a proposal specifically designed to introduce post-quantum signature schemes to Bitcoin, gets a cautious nod in the report. BlackRock called it a credible and well-designed piece of a larger puzzle, but stopped short of endorsing it as a complete solution. Bitcoin developers have already been testing quantum-resistant signatures on live sidechains, so the groundwork is moving, slowly.
BlackRock puts money behind the concern
The firm is not just writing reports. On Thursday, BlackRock joined Coinbase, Fidelity Digital Assets, and Block in announcing the Bitcoin Security Consortium, a new initiative pledging $15 million to fund open-source engineers working on quantum-readiness proposals. Strategy also signed on. The money is earmarked for "the decades ahead," according to Bitcoin Magazine's coverage of the announcement.
BlackRock has clear reasons to care. Its spot Bitcoin ETF, launched in 2024, set the record for the most successful ETF debut in industry history, and the firm also runs a spot Ethereum fund. CEO Larry Fink has publicly described Bitcoin as "digital gold" and an "international asset," and has spoken at length about how blockchain infrastructure could tokenize real-world assets at scale. A quantum vulnerability that undermines confidence in Bitcoin's cryptography would be a direct problem for BlackRock's product line, not an abstract one.
This article is for informational purposes only and does not constitute financial or investment advice.
