The only reason why the term "store of value" even exists in the first place is because fiat currencies: don't. The funny thing about that is there is no rule that says fiat has to lose value over time. It just tends to work out that way in a centralized debt-based system that craves stability. What happens when fiat currencies move to a different model? Is that an unreasonable expectation? Maybe. But also maybe not. I think that greatly depends on how badly the current system collapses and what kinds of solutions crypto has to offer at that time.
It craves Growth and opportunity, not stability. You know what devalues fiat: easy credit. You know what strengthens fiat? Price fixing, tariffs and higher interest rates, or "reseting" the currency a la Brazil and every country where 1000 rolled back to 100 or 10.