Quantum computers could one day break Bitcoin’s security, letting hackers steal funds by finding private keys from public keys..This risk is called “Q-Day” — when quantum machines become strong enough to crack Bitcoin encryption like ECDSA using Shor’s algorithm..Around 6.9 million BTC in old wallets may be at risk because their public keys are already exposed on the blockchain..Hackers could also attack transactions in progress, stealing funds before they are confirmed within Bitcoin’s 10-minute block time..To stay safe, experts suggest upgrades like quantum-resistant cryptography, moving funds to new wallets, and future Bitcoin hard forks..Read More Stories