Do you see China falling because they've banned bitcoin? Why? Won't they be able to produce smartphones, clothes, teacups, or raise pigs because of this?
You can't compare countries of different regimes, expecting to make a proper conclusion. If the pigs administrate their economy, last thing they'd want is uncontrollable, censorship-resistant money. Also, who says it's banned? All I know is that they've forbidden mining.
Again this is about countries, not about individuals, that's a whole other thing, individuals for example can move, but I'm yet to see a single forum member moving to Salvador to take advantage of taxes or freedom or opportunities.
Perhaps because there are hundreds of other reasons one won't leave their country?
For me is quite interesting how at the same time people lean towards total libertarianism but at the same time they are trying to bring the authorities into the picture, and in all this mess, despite being willing to go to extreme lengths to cut their control and say in the matters they somehow manage to find a scenario where this will reward them for nonimplication.
I wouldn't say all those who use Bitcoin are libertarians with emphasized ideals etc. Most are probably conservatists who just want to make a few bucks and pretend to support this libertarian movement. As you said, most are here for