One minor problem is that we do weird things with “debt” that weren’t done before (like the SSA holding billions (trillions?) in debt, along with pensions, etc). It’s actually hard to make comparisons to 100 years ago in other countries because so many things are now monetized that weren’t before.
It wouldn't surprise me if the debt causes a financial crash a bit like 2006. Crashes happen pretty regularly and things are quite lined up for one of those - all it would likely take would be an AI plateau for example. Currencies dying are rare though. They can decline in importance like the pound, but generally plow on.
