US quantum orders revive focus on Bitcoin address exposure

Washington's new quantum computing orders matter for Bitcoin because they shorten the timeline investors use to think about cryptographic risk. On June 22, President Donald Trump signed one order that pushes federal civilian systems to adopt post-quantum cryptography for key establishment by the end of 2030 and for digital signatures by the end of 2031. A second order starts a program to deliver a quantum computer for scientific use at a Department of Energy site.

That shift has renewed attention on Bitcoin outputs with public keys already exposed on-chain. The source report says almost 7 million BTC, worth about $449 billion, falls into that bucket. Bitcoin is not described as broken at the protocol level. The problem is concentrated in coins tied to reused addresses and older output types that permanently reveal public keys.

Exposure is heavily clustered. Dune data cited in the report shows 84.5% of exposed BTC sits in 4,079 wallets, while over 70% of exposure comes from address reuse. The report also highlights about 1.08 million BTC mined in 2009, widely linked to Satoshi-era holdings, as especially vulnerable because they use Pay-to-Public-Key outputs.

Researchers cited in the source say a machine able to attack blockchain cryptography is still years away. But Bitcoin's larger problem may be coordination: even slow, well-known upgrades have taken years to spread across the network.