It this supercomputers are going to be available in the future, then for sure crypto could also make some advancement in order to cope with this quantum computers.
Every code is available out there and majority have devs to make adjustments.
So I'm not afraid about this technologies, what I'm afraid of is the hackers and scammers that are going to still be in the market in the future. In short, it's still human that is the threat to us and this this AI or QC.
This is basically the history of the technological development of our species, if someone created a sharper sword then someone will create a more resistant armor, someone invented the gun making armor for a time useless until someone developed bullet-proof vests.
And the same will happen here, even if at some point the current algorithms are broken they will be replaced by something else that is not as easily broken, so I am not worried about this at all.