| Mobile Web

30 percent of bitcoin at risk of quantum exposure, Glassnode says address reuse key

About 30.2 percent of issued bitcoin is stored in addresses at risk of quantum exposure, with a larger share stemming from how users and custodians manage addresses rather than from protocol structure, according to an estimate cited in a report. Glassnode put quantum-exposed bitcoin at 4.12 million BTC, more than twice the 1.92 million BTC it classified as structurally exposed due to older script types. Exchange wallets were singled out as a major source of operational exposure.