What about UK, or Japan, or China, which don't have reserve currencies right? They run deficits just like the US. It turns out, if your economy has productive c

What about UK, or Japan, or China, which don't have reserve currencies right? They run deficits just like the US. It turns out, if your economy has productive capacity, it isn't really a problem to print your own currency. Economies that have trouble are those that are strapped for HARD resources (real stuff).