Coinbase report warns 7M Bitcoin at risk from future quantum attacks
**Coinbase Estimates 7M Bitcoin at Future Quantum Risk**
Coinbase’s Quantum Advisory Council warns that millions of BTC may face exposure in a post‑quantum era. This is not a current threat — the risk is tied to future advances in quantum computing.
The report identifies about **1.7M BTC** in old P2PK formats and **5M BTC** tied to reused addresses. These coins could be vulnerable if cryptography changes are not made before quantum capabilities arrive.
Proposed mitigations include:
- Migration deadlines to move coins to secure address types
- Zero‑knowledge tools like BIP‑361
- An “Hourglass” withdrawal limiter to slow potential exploits
Any migration would require broad consensus, precise engineering, and strong coordination. Actions to freeze or limit access to abandoned wallets would likely be contentious.
For investors, the takeaway is strategic — quantum risk is framed as a governance and migration challenge, not a market‑moving threat today. The debate also addresses how inactive holders and lost coins might be treated if a future cryptographic shift is needed.
Watch for: community reactions, BIP‑361 progress, and post‑quantum plans from other major infrastructure players.
