As long as you don't print more money than what others are printing who cares. The US has given up trying to curb spending since Trump got in, problem is, who's going to collect on the debt... China on the other hand just prints money, and then fixes its currency value to stop it going high enough to affect business, so presently, cash currency is worth almost nothing in reality as no one is holding it to any value at all. There is most likely a big shake up coming that will force a change in how wealth is determined, but who knows what, when and how that will manifest.
All money does is make things with no value have perceived value. I can buy a litre of milk for $1, but a 400ml bottle of water is $4... now would you swap 4 litre of milk for 400ml of water? but we effectively do that each day in millions of transactions.