One third of the Bitcoin supply is now “visible” to future quantum computers — and the figure keeps rising.
Key figures:
• 7.12 million BTC (35.4% of the supply) have public keys already visible on-chain — Glassnode, Nov. 10, 2026
• 25.8% of the supply is exposed due to address reuse, including 11.6% linked to exchanges — Glassnode, Nov. 10, 2026
• 24.8% in early 2021 → 30.2% in May 2026 → 35.4% now, the highest in this series — Glassnode via Crypto Briefing, Nov. 11, 2026
What this means to me: this isn’t a warning that “BTC will be hacked tomorrow” — no quantum computer can break Bitcoin signatures today, and there’s no predictable timeline for an attack. What Glassnode measures is the blast radius: coins whose public keys are already exposed on-chain would be the first targets if such a machine ever existed. The fix is simple in most cases: move coins from reused addresses to new ones.
What I’m watching next: whether BIP 360/361 (post-quantum output proposals) move from drafts to serious discussion, and whether exchanges start moving their reserves.
This is my analysis, not financial advice — always DYOR.
Do you think this quantum risk deserves a place in long-term holders’ calculations, or is it still too far off to think about?
#Bitcoin #Quantum $BTC
Key figures:
• 7.12 million BTC (35.4% of the supply) have public keys already visible on-chain — Glassnode, Nov. 10, 2026
• 25.8% of the supply is exposed due to address reuse, including 11.6% linked to exchanges — Glassnode, Nov. 10, 2026
• 24.8% in early 2021 → 30.2% in May 2026 → 35.4% now, the highest in this series — Glassnode via Crypto Briefing, Nov. 11, 2026
What this means to me: this isn’t a warning that “BTC will be hacked tomorrow” — no quantum computer can break Bitcoin signatures today, and there’s no predictable timeline for an attack. What Glassnode measures is the blast radius: coins whose public keys are already exposed on-chain would be the first targets if such a machine ever existed. The fix is simple in most cases: move coins from reused addresses to new ones.
What I’m watching next: whether BIP 360/361 (post-quantum output proposals) move from drafts to serious discussion, and whether exchanges start moving their reserves.
This is my analysis, not financial advice — always DYOR.
Do you think this quantum risk deserves a place in long-term holders’ calculations, or is it still too far off to think about?
#Bitcoin #Quantum $BTC