My understanding is that those citizens were using their money to support people who were intentionally blocking one of the main functions of a national government (regulating international trade).
> In Russia, citizens have been instantly locked out of international financial transactions, and non-local currencies have become unavailable. It is likely that further, dramatic interventions in ingress/egress of wealth are forthcoming.
Russians have no right to perform transactions using US Dollars, and as an American citizen I have no right to perform transactions in Rubles. Our governments regulate that (again, international trade).
> In China, random decisions regarding the legality of Cryptocurrencies are regularly enacted. Huge businesses doing legal, ethical mining are one day accepted, and the next -- made illegal.
In China, many government decisions are like that. Like when they overnight decided to restrict vehicle access to Beijing to try to reduce pollution leading up to the 2008 Olympics. I doubt actions like these come as a surprise to Chinese citizens. And, again, it's largely related to international trade.
In our modern world of nation states, the individual citizen does not have unfettered access to all the world markets. Our governments place restrictions on trade, and they will do the same with cryptocurrency. You can try to evade it, either through bitcoin or gold bullion, but it is not your right.