While most bitcoin investors no longer use p2pk addresses, they remain vulnerable to them anyway. Once a quantum computer publicly derives a private key from a public key, bitcoin's price will most likely crash.

Are quantum computers a threat to Bitcoin?

When crypto investors discuss quantum computing, they invariably worry about its potential to undermine encryption. Quantum computers alone do not pose such a mortal threat, however. ... That's because Shor's algorithm can factor large prime numbers, the security behind asymmetric encryption.

Can Bitcoin survive quantum computers?

Within a decade, quantum computers could be powerful enough to break the cryptographic security that protects cell phones, bank accounts, email addresses and — yes — bitcoin wallets. ... This is precisely why cryptographers around the world are racing to build a quantum-resistant encryption protocol.