Crypto

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.

Crypto

Glassnode says 10 percent of Bitcoin supply is structurally vulnerable to quantum computing, watch gaps by exchange

About 9.6 percent of Bitcoin\'s total supply is in a structurally unsafe state if quantum computers eventually break cryptography, an analysis said. On-chain data firm Glassnode estimated about 1.92 million BTC is tied to address types that expose public keys. It highlighted holdings linked to Satoshi Nakamoto, early-era coins and Taproot-based addresses. The analysis said theft risk is not imminent and noted wide differences in exposure across institutions and exchanges.