A nitpick: the dollar isn’t really money, it’s currency.

Any standard definition of money notes not only its use as a medium of exchange, but also its function as a “store of value”. The USD fails at this. Gold passes that test. And it can be argued that Bitcoin does a better job at it than the USD does.

The USD is backed by “the full faith and credit of the United States government”, in other words, it’s backed by debt.