Coinbase Head of Investment Research: Approximately one-third of Bitcoin faces the risk of quantum attacks.

David Duong, Head of Investment Research at Coinbase, stated that approximately one-third of the Bitcoin supply appears vulnerable to remote quantum attacks. Duong believes that the rapid advancements in quantum computing have transformed the threat to Bitcoin from a distant theoretical concern into a structural risk. Currently, the encrypted outputs of wallets containing about one-third of the Bitcoin supply are publicly visible, making them susceptible to brute-force attacks. Duong points out that quantum computing poses both economic and direct risks to Bitcoin. If quantum machines are powerful enough, they could mine Bitcoin blocks more efficiently, distorting the network's incentive structure. Furthermore, quantum computers can derive private keys from publicly available public keys, leading to the theft of funds from affected addresses. While quantum mining is currently a secondary concern due to its scalability limitations, signature security has become a core issue. Previously, BlackRock also listed quantum computing as a risk factor in its revised prospectus for the iShares Bitcoin Trust, filed in May.