Breaking public-key cryptography: Quantum computers could derive Bitcoin private keys via Shor’s algorithm..Mining takeover: Grover’s algorithm may accelerate mining, centralizing power..Harvest-now-decrypt-later: Attackers may store encrypted data today to decrypt when quantum is ready..Forging signatures: Quantum machines could impersonate users by faking ECDSA signatures..Trust collapse: A quantum exploit could erode confidence and crash Bitcoin’s value..Read More Stories