The Bitcoin Quantum Exposure Dashboard shows 6,900,573 BTC exposed at block 950,000, but cryptographic exposure overstates practical theft risk. Active balances of at least 1 BTC account for 3,331,639 BTC, or 48.28% of exposed supply. Operational entities are among the most likely to monitor quantum developments and migrate before a practical attack window opens. Excluding known operational entities leaves 2,277,978 BTC in dormant or never-spent balances of at least 1 BTC, with Satoshi-attributed coins retained. Dormant and non-responsive balances present the most persistent practical quantum risk. Attack costs and limited throughput make the highest-value exposed balances more likely initial targets.
