Jeebus. If we already have stable and reliable quantum computer that could constantly attack and potentially crack bitcoin, then mate, we have far bigger problems than bitcoin being "hacked".
Haha yeah, if the worst thing someone with a quantum computer could do is hack Satoshi's wallet for a million plus bitcoin in a few seconds, then the owner isn't being very creative!
It would be terrible for crypto, but that quantum computer could do a lot more damage elsewhere.