And then I transfer that to a different country and convert it their.
You don't need 1 government to do this. You need EVERY government to do this.
This is useful, in the sense that someone in venezuela is at serious risk of the government taking their money if it is in a bank, but they really couldn't do that to their Bitcoin.
Yes, if it is the US government doing the banning, you are significantly less likely to get around the ban.
But the world is not US centric. There are many governments would try to oppress their population by using the power of the banks, but would be significantly less effective against crypto transactions.
People are using crypto right NOW to get around many currency control laws implemented by governments. So they are successful getting around financial censorship that is already happening.
So now you have currency in another country. As long as your country doesn't allow you to repatriate, you still have nothing. It's the same as holding US dollars in a US bank while living in another country that regulates getting the money out (except worse because fewer people will accept BTC vs. USD). As long as you cannot spend it, it is worthless.
