Put differently, a breakthrough in mathematics that breaks ECDSA requires a lot more priors than a breakthrough in QC.
Curiously, but:
- how sure are we that this assertion is true?
- would we still have the necessary resources given we find that breakthrough to accomplish this with classic computers?
Yes that's right. Quantum computers will not beat BTC, because quantum technology is needed for world progress, DLT, 4IR (smart city, IOT, AI).
I mean, how is even that relevant? Quantum computers "
can" beat Bitcoin in theory, but we miss the resources to do it in practice, as far as I understand. And by the way, if it ever happens, it'd break the entire Internet, not just Bitcoin.