That works as long as you already have liquid assets you can just flee with. The flip side is that bitcoin would have been the SS’ dream for punishing anyone who transferred funds to fleeing Jews and, of course, the ability to taint entire chains of transactions would mean that anyone hiding in country wouldn’t be able to use those funds like they would cash or gold. I also don’t like the possibilities were, say, refugees trying to buy passage suddenly hit with the German government reporting all of their accounts as stolen.

It’s an interesting thought exercise but ultimately the lesson is “don’t let fascists gain power” because technology can’t save you.