I bet that most people know how you actually borrow $100 from a bank and you need to get back $101 and in order to do so you need to borrow another $1. So this is infinite loop that has flows. Economy will collapse again it's a matter of time. For USD to become "worthless" it takes much more than buying in crypto. Even if USD starts becoming useless do you really believe that US gov will "let it be". Naaah I thought so. Don't worry about USD and yeah invest in crypto (why not?).