TL;DR
Coinbase’s Quantum Advisory Council says post-quantum migration planning should begin before quantum attacks become practical.
The report estimates about 7 million BTC are quantum-vulnerable because public keys are exposed through legacy formats or address reuse.
About 1.7 million BTC are said to sit in legacy Pay-to-Public-Key addresses, including early mined and potentially abandoned coins.
The council frames the issue as a long-term governance challenge, not an immediate emergency.
Coinbase’s Quantum Advisory Council has warned that Bitcoin and other crypto networks need to begin planning for post-quantum migration well before quantum computers can realistically break today’s public-key cryptography.
In a June 11 report titled “Post-Quantum Migration and Abandoned Coins,” the council framed the issue as both a technical migration problem and a governance dilemma. The core question is not only how to move users to quantum-safe addresses, but what the ne
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