Maybe you are from a country with a passport that does not preclude you? Sure, it might be possible to move depending on age and various connections that people might have in their own country and/or barriers that people might have in terms of entering other countries... and then perhaps questions of selecting where they might want to live.. but still, I am not going to presume that moving is necessarily a realistic option for as many people as you seem to want to presume.
The only one-size-fits-all solution I see is the legislative approval of bitcoin for citizens. All other decisions are purely individual. If bitcoin is banned in the country, then waiting until everything is resolved right at home can be too long. The whole country will not be able to move, and there is no point, because then the government would have to listen and allow bitcoin in that case.
But the individual solution may be different. If the accumulated capital allows, then the passport will not be an obstacle. If some years ago, 10 thousand bitcoins could only buy a little pizza, now El Salvador offers a residency by investment program, where it is enough to invest only 3 bitcoins in the country. As the price of bitcoin rises, it is likely that a smaller fraction of bitcoin can become significant capital.
Of course, it's hard to be sure, but I think a lot of people on this forum are pinning their hopes on bitcoin for a better future. Why not?