I think that it's a correct position now, but probably temporary in some sense. We didn't start with a cash system, and we may not end up with one, but for this moment in time it's a useful way to measure value/wealth.

Ideally one would think "it's all about happiness" would be the goal, not a measure of asset worth, but rather contentedness perhaps? It doesn't take much thinking to imagine why we can't function in that way, however.