Historically it seems likely that there will be several weeks or even months of warning where a reasonably prepared person can react. What sort of crisis would immediately or surprisingly close all borders? Coronavirus closed many borders, but we had many weeks to react before that. A significant challenge might not be leaving, but being accepted to another country.
Some practical and mostly cost-effective ideas that should increase the speed and odds of escape:
In the end, the two most important things are probably 1) having plans and 2) being ready to act on them. All of the others are nice but optional. Ultimately all that matters is that you exit.
I would expect establishment of concetration camps and suspension of freedom of assembly to be pretty big triggers.
However I do not have confidence that that without having the ending be spoiled I would figure out to move out. And even knowing that there were some dark times ahead staying to fight or mititgate the damage would be reasonable options as well.
Thank you for asking this - I would really like to know what others are planning. My current (very low confidence) triggers:
Scenario: Trump doesn’t leave office, causing a constitutional crisis. Exit conditions:
Scenario: Cultural revolution analog. Exit conditions:
Regarding assets being frozen: the following are travel agencies which accept cryptocurrencies:
Keeping enough crypto for flights is a small enough cost to me that I'm planning to do so.
I also looked a bit into travel, which is slightly complicated by me having a cat. The easiest is Mexico, which can be visited for up to 180 days with no visa, and cats do not need any certification. Cats can be brought to Canada with a rabies vaccination certificate. My basic thought is that if one of these triggers happen I would go to Canada or Mexico on vacation fairly reflexively, and then reevaluate my options once there.
One relatively easy and low-cost idea: buy some physical Bitcoin and/or gold, hide them somewhere, and hedge them with short positions (in Bitcoin futures and/or gold ETFs) if you don't want to be too exposed to their price movements. It's probably a good idea to have some exposure to them anyway as a hedge against inflation. And in case it's not clear, physical Bitcoin means on a hardware wallet that you can easily hide and carry with you when you need to move.
Expanding from a comment thread: https://www.lesswrong.com/posts/3jYwvwrNXyD3koHTM/open-and-welcome-thread-june-2020?commentId=FcZwHEWEt6EAP54qq
Growing up, I had a neighbor who'd escaped the Cultural Revolution as a child, going from very wealthy in China (she had bound feet, and had literally never seen food being cooked) to working- and then middle-class in the US. I have a number of friends with relatives who escaped or survived (or didn't) the Nazi Holocaust. In both of these cases, there were many months where someone could get out pretty easily (but at significant cost), but it wasn't clearly necessary. And then many weeks where the rich could get out (at a very high cost), and then it was too late. The US Civil War took 4 months from first declaration of secession to the shooting war starting at Fort Sumter. Travel was much harder back then, so I'm not sure how possible escape was was for most.
As things get ... weirder in the US, politically and economically, there is a (very low IMO) chance that things will collapse badly enough that it's worth significant disruption (leaving friends and family, possibly abandoning hard-to-move assets, certainly incurring expenses) to move out.
I expect that my perception of the chance over time, conditional on it actually happening, to be roughly logistic in shape, and with some intersection on a graph (whose shape I'm unsure of) of "cost/difficulty to get out". And complicated by contagion - it's not clear the US can fully collapse without taking with it most places I would want to go.
So: what are YOUR triggers and preparations for escaping if Very Bad things happen in the US?