Surprising enough the currency collapse in Weimar Germany didn't bring business to a halt, bankruptcies went up a lot on the brief occasions some sort of order was returned to the moneys collapse but when it was shot to hell there where few more than normal averages. Things weren't good by any means but they kept some sort of order even when you'd save a hell of a lot paying for a meal before instead of after. That's not an overnight collapse or civil war breaking out though but if the dollar went out with a bang there'd be plenty of similarities.
I actually thought the same thing when composing my argument. But the reason I didn't use it as a counter argument to my own point was that Germany had plenty of healthy neighbours they could still barter with. A lot of countries would be in a mess if the dollar collapsed. Subsequently the dollar collapse would probably be much worse than the Weimar Republics hyperinflation, much worse than Zimbabwes too.