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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The computer needs 4000 qubits.
currently the largest has 256 qubits
https://phys.org/news/2021-07-team-quantum-simulator-qubits-largest.html
What's stopping them from plugging in 16 of them together to make 4000 qbits.
Physics.