What will we be using, Chinese Yuan?
Wouldn't that be if the Chinese Yuan doesn't hyperinflate as well, the United States have prolly taken poor but necessary decisions such as printing more money during this pandemic, decisions that'll definitely come back to roost, but so also have other countries, China as well, they all have been/will be in the future affected by the pandemic in one way or another, so in a couple of years time, it's not just going to be the U.S. facing the brunt of a falling Fiat currency (inflation), but somewhat all the currencies of the world.
But the thing is, the United States and their Dollar is so powerful, and despite how bad it prolly looks, I wouldn't predict a state of hyperinflation in the United States, neither do I think their Fiat will come of worse than other countries, pricing of Bitcoin I think will still be done in the U.S dollar and it's general acceptability worldwide will still stand.