Corallo explains that most Bitcoin wallets use hierarchical deterministic (HD) seed phrases, which use quantum-safe derivation schemes. The vulnerability lies mostly in the public key exposure, which can be mitigated by a soft fork requiring seed phrase proof. The market fear regarding a "Quantum Apocalypse" for Bitcoin is overstated FUD. Furthermore, if the network is forced to disable "insecure spend paths" (old P2PK addresses and lost coins like Satoshi's stash), it would effectively burn ~5% of the supply (1.7M BTC). LONG. The FUD creates a buying opportunity, and the worst-case technical solution results in a massive supply shock (deflationary event) that increases the value of remaining secure Bitcoin. A "cryptographically relevant" quantum computer emerges secretly and attacks before the soft fork is activated.