Which will be kind of like the olden days of a hundred or two hundred years ago, when every state issued its own currency, or every bank, or every goldsmith.

Which is to say that it will fly in the face of the general trend of development of these things, which has been towards fewer currencies, not more. More currencies means more friction in trade and commerce, since it makes price comparisons harder and forces buyer and seller to constantly be making conversions; this in turn means less commerce happens, which makes everyone poorer. That's a bad thing, not a good thing.