I can say this from my experience, we used a pseudo fiat kinda bond paper to replace the fiat. But before that we ... Thing for thing deals, like before the creation of the money. Also we used papers that had value only inside the black market, we get them after we gave something.

We had 5 presidents in 7 days....

Aaaand looks like we are heading to that again.

I have the experience of shit getting real and I already thought a lot about BTC as a currency here.

I can't see the right answer and I don't want to live that hell again