> ownership of cryptocurrency (PoS)

The problem is that PoS commitment isn’t binding. You can always stake your money, then if you don’t like the outcome, you can just pretend the first stake never happened and do it again. Cf “grinding” attack. PoW is unique in that any claimed commitment corresponds to a real, physical, irrevertable commitment.

> or storage space as that rare resource.

Every storage coin so far has been some sort of DINO scam. The most interesting one is Chia but it’s absurdly complicated, and I think that complication might mask some centralization/vulnerability. For example, the reliance on “time lord” nodes strikes me as very questionable.