There are other elements of money, more so the circulation; storage; leveraging (borrowing); and deployment of money, that aren't generally appreciated.

In addition to money, where there is money, there is also tax due to money being a creature of the law.
Tax acts as a demand on money causing it to circulate. Using said money for exchanges is a welcomed by product.

The coining and minting of money is a sovereign prerogative meaning that its (moneys) production is the exclusive right of the king over and above his subjects.