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Glassnode: 6.04M BTC with exposed public keys puts exchanges at quantum-risk hotspot
Glassnode says 6.04 million BTC—30.2% of circulating supply—sits in wallets whose public keys have already been revealed after spending, a setup that concentrates potential quantum-related risk in large custodians. The dataset indicates exchanges hold about 1.66 million exposed BTC, while exposure varies widely by entity, from Binance's 85% to Coinbase's 5% of labeled balances.