Question

What was one of the main problems with states controlling their own currency?

Answer 1

you are saying each state gets to print it's own amount of US currency? Or each state having it's own set of notes. The second way you'll have huge problems with exchange rates, 50 different exchange rates, depending on the productivity of each state just within the US! In the first way, then some rogue banker or senator would then have the right to print as much money they wanted which could cause inflation to get out of control. Hope this helps."