Glassnode Finds 20% of Bitcoin Quantum-Exposed by Behavior, Not Code

Glassnode data shows 4.12 million Bitcoin (BTC) are held in quantum-exposed addresses due to address reuse, partial spending, and custody practices, more than double the 1.92 million BTC exposed by Bitcoin’s older script types. The on-chain firm splits Bitcoin’s quantum-exposed supply into structural risk stemming from the protocol’s design and the exposure of public keys,