Assume for the sake of argument that there is wealth there, although as @Kropotkin and @Blackwater_Park said, that’s open to question.
The key question is how good are the encryption algorithms by Bitcoin to shield ownership of the supposed wealth? I don’t think we know yet. The way that I understand quantum computing, it’s faster than blazes. But the question is – can it decrypt something that has one way encryption? Not sure that it does.
The FBI and criminal justice system haven’t decrypted Bitcoin info so far; they have done a lot of pattern matching and good old fashioned detective work. So it isn’t clear that Bitcoin ‘secrets’ will be helped by faster computers.
At this point (April 2023) it is too early to make an educated guess to the question.