Well you can’t drive money, fly money, surgery money, publish money, build a house out of money that doesn’t melt in the rain…

If you want to put it that way.

But given we agree it is absolutely useless, you should probably periodically trade some of it for food. Etc.

That works out really well, since money doesn’t mold as quickly as food, and doesn’t require refrigeration. So accumulate money, let it work for you in the form of productive capital, but skim it for food purchases.

money gets inflated into monopoly money.

Presumably "money" in this case doesn't mean literal hundred dollar bills stuffed into mattresses. They're being invested.

".....and it's gone." (south park)