> Watch the USD. Once it plunges, it's over.

Historically ( past few decades ), during recessions and international crisis, foreign money would flow into the US, japan, switzerland, etc. But primarily to the US because we are the safe haven for the world and that inflow helped prop up the dollar.

If a major recession or international crisis occurred and foreign money didn't flow into the US, then it would signify a paradigm shift in the international political/economic order.

I don't think ( at least I hope ) we are anywhere near a paradigm shift in the world order given our preeminent military and economic position and our alliances around the world.

But I guess even the brits during reign of the british empire thought that their party would last forever.