If the US government can do it, so can I. After all, no State has rights not held by the individuals who make it up, and no individual has more rights than any other. And if rights are imaginary, then no one has a right to rule me or coerce me, so...
Here is the one and only 1 Million Money Note in existence. So far, anyway.
I authorize myself- through my own Constitution- to issue Money in whatever form I see fit (it says so right on the back of the note).
The current exchange rate for a "Money" is 1 Money to $0.75 (in Federal Reserve Notes). Silver and gold are given preference in exchange, and get better rates, though.
Acceptance is not mandatory, but is purely voluntary. Laziness on my part, and my inability to issue Money electronically, ensures that Money will never hyperinflate itself in the way US Dollars are guaranteed to do.
But, just like Federal Reserve Notes or US coins, it is only really worth the material, the paper or metal, that makes it up. Only the belief it is worth more makes it worth more.