Bitcoin Quantum Exposure: 30% of Circulating Supply at Risk

Over 30% of Bitcoin's circulating supply is exposed to potential future quantum-computing attacks, according to a recent Glassnode report. The study found that around 6.04 million Bitcoin, which account for 30.2% of BTC's total supply, currently have public keys visible on-chain, putting them at 'at-rest' quantum exposure.

The report also identified exchange wallet-management practices and address reuse as major contributors to operational quantum exposure. Coinbase showed relatively low exposure levels in Glassnode's report at just 5%, while Binance recorded significantly higher exposure at 85%. Bitfinex and Gemini were listed at 100% under the report's framework.

Market watchers like Strategy (MSTR) chief executive Michael Saylor and Bitcoin cryptographer Adam Back have pushed back, saying that the threat is not immediate. However, Glassnode split the vulnerable supply into two categories across 'structural exposure' and 'operational exposure,' with operational exposure accounting for roughly 4.12 million Bitcoin.