They'd better fasten their seat belts.
[sidebar] My dad went through that drill before he emigrated here. A firm believer in having gold. Told of one old lady who had two gold bracelets. She would pawn one, live on that money, then pawn the second, pay off the first with the cheaper Marks, and stair-stepped her way through the whole mess.
Great book on the German hyperinflation.
https://www.amazon.com/When-Money-Dies-Devaluation-Hyperinflation/dp/1586489941
Mentions US students living in Germany sent dollars by parents who were able to live like kings