This is solid economics iff you assume that crypto has a utility for which there is no substitute which does not share the same supply constraint feature, and even then its not solid economics for a current investment unless you also assume that that utility is the entire basis for its current valuation. Because even if it has a nonsubstitutable utility, if that's not the basis of its current value, then the "solid economics" is that there is some price it could reach from which further value drop because of supply (of substitutes) will not erode value, but there is no guarantee of what that level is.