[Citigroup Report: Bitcoin Faces Higher Quantum Attack Risk Than Ethereum, About One-Third of BTC Could Be Affected] According to a report by CoinDesk, Citibank stated in its latest report that the pace of breakthroughs in quantum computing is faster than expected, compressing the timeline for security risks to crypto assets and internet infrastructure. Bitcoin, due to its more conservative governance and slower protocol upgrades, is considered the most exposed to quantum risks. The report highlights that early P2PK addresses, wallets with public keys already exposed on-chain, and some long-dormant addresses (including wallets believed to belong to Satoshi Nakamoto) face a potential attack surface of "exposed public keys." It is estimated that approximately 65,000 to 69,000 BTC are at quantum risk, accounting for about one-third of the circulating supply. Citigroup believes that PoS networks like Ethereum, due to more frequent upgrades, are more flexible in migrating to quantum-resistant cryptography. However, future high-performance quantum computing could also pose a threat to validator keys.