Few days ago there was a news, that Bitcoin will be legalized in Russia in 2018. So, I can't understand - if it can be legalized, does it mean that Bitcoin can be banned? If it's true - how does it possible?
You understood it mate on the opposite way, when it comes to legality the government has always the approval of it and they are supporting it. And with that news, Russia is going to support bitcoin but the word regulation will be coming from them. Transactions will be monitored.
Maybe there were some precedents, when government can block Bitcoin (any other cryptocurrencie) ? Cause if my understanding is correct, they need to disable all the Internet to stop Bitcoin.
They can't stop bitcoin or other crypto's but they can ban it.