The best way to resolve Bitcoin quantum concerns is to permit a fork: one where technology converts old quantum vulnerable UTXOs into anyone (with a quantum computer) can spend outputs and one where people who didn’t move coins to quantum resistant addresses by a flag day become no one can spend outputs. The market will decide which coins matter.

My personal belief is that money is for living people, but I’m not sure I’m opposed to money being for dead people too, it’s just hard to reason about. On either chain, bitcoin is still limited, whether we permit treasure hunting or not.