Glassnode Flags 4.12M BTC as Quantum-Exposed via Address Reuse, Plus 1.92M BTC Structural

Glassnode data estimates 4.12 million BTC are exposed to quantum risk due to holder behavior such as address reuse, partial spending, and custody practices, exceeding the 1.92 million BTC tied to older script structures. Together, the two exposure buckets sum to 30.2% of all issued Bitcoin, with the larger share linked to key and address management rather than legacy code.