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Ledger CTO Charles Guillemet stated that the view that only 30.2% of BTC faces quantum computing risks is problematic. Guillemet pointed out that public key exposure risks are widely present in xpub, devices PSBT、 In the log or backup, and when BTC initiates a transaction, the public key will be made public. The attack on secp256k1 can be completed within 9 minutes on a high-speed quantum computer, and Bitcoin needs to be migrated to post quantum cryptography.