The quantum threat to traditional finance is far bigger than to Bitcoin, and almost nobody is talking about it. TradFi runs on RSA and ECDSA keys baked into SWIFT, card networks, clearing systems, and bank infrastructure that takes years to patch and has no upgrade consensus mechanism.
Bitcoin, by contrast, can soft-fork in post-quantum signatures across the entire network the moment the threat becomes real.
For Bitcoin holders, three steps matter most to prepare:
1. never reuse addresses, since a public key is only exposed after you spend from it;
2. move funds to fresh, unused addresses so only the hash is on-chain.
3. stay ready to migrate to quantum-resistant address types once they ship.