Saw a comment on a banking thread that said that Quantum Computing will kill crypto, I assume because it would be able to edit the blockchain and thus killing the entire point of bitcoin, but how exactly would it do this? How does it work and why does it mean all current encryption would become useless?
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By compromising SHA-256.
The entirety of bitcoin's scarcity relies on the security of SHA-2. This is why I don't have any, because I have NEVER believed that SHA-2 was secure for anything more than data-in-flight.
I acknowledge that, yeah, I left some money on the table there. Bitcoin certainly demonstrated its potential. But I don't trust SHA-2 for durable storage.