Russia of course can easily ban cryptocurrency and create its own one. However, I believe that they won't do it, because nowadays bitcoin is so spread around the world that plenty of people already use it and keep their funds in it. Of course, some countries ban it, however I don't think people are glad to live in such countries, where bitcoin and crypto brokers arebanned, while all their funds were in bitcoin. Even if Russia will ban bitcoin, it won't lead to something positive, because Russian government understand the necessity of cryptocurrency nowadays. At least I tend to believe in this. If it will launch its own crypto, maybe this project will be successful, who know and it will be a real competitor to bitcoin. The time will show us everything.