BlackRock warns of quantum computing threat in Bitcoin ETF risk disclosure

On May 9, 2025, BlackRock revised its S-1 registration for the iShares Bitcoin Trust, citing potential quantum computing threats to Bitcoin’s cryptographic security, reflecting growing industry concern over digital asset security.

Despite these warnings, the iShares Bitcoin Trust remains the largest spot Bitcoin ETF, attracting over 5.1 billion USD in inflows. Additionally, BlackRock’s Ethereum ETF filing introduces a model allowing direct exchanges of ETF shares for Ethereum.