RE: I was thrilled when Gold went up to 400 Fiat USD's per ounce...

Yeah, nobody wants to believe me, either.

At 2000usd gold, we could knock 2 zeroes off of prices and be back to parity, but now it's almost 50% higher.
I'm with you on the transition back to sound money, I don't see them repudiating coins, ie, declare them worthless and issuing new.
I saw an article about Malaysia, or somewhere, resetting their money and one of their coins went up 50,000x, but I can't find that article, anymore.
I had some 1970's mexican coins that only had melt value, I thought I had made a good deal for them only to find out they weren't worth carrying to town.

So, I see tptb floating the frn and letting the banks worry about how to pay back the people, and declaring the usd to be restored to its constitutional definition, 371.25gr of pure silver.
Doing that will require base metal coinage to make change.
When the banks finally collapse, the new money will be issued to everybody, likely from post offices.