Most Bitcoin wallets are safe, even if the quantum thread is real, until you spend from them. When people send Bitcoin from a wallet, the transaction reveals the wallet’s public key on the blockchain. Normally, that’s not a problem, because under current cryptography, it’s computationally impossible for classical computers to reverse-engineer the private key from the public key. However, if powerful quantum computers capable of running algorithms like Shor’s algorithm were ever built, they could potentially crack the link between public and private keys much faster. In contrast, Bitcoin that has never been spent would be far harder to attack, even in a quantum scenario. For Bitcoin holders concerned about future quantum risks, the simplest safeguard is to move funds to a new, unused address and avoid spending from it.(BloFin Academy)