Putin used to keep everything under control. Russian even an opinion can not Express freely. You think he might allow free circulation of cryptocurrency? Lol. I'm sure he will ban all cryptocurrencies except the one which is created by Russian. I will never use it. I would not be surprised if along with the code of the wallet to the computer is installed some kind of spyware. I don't believe the Russians and their currency.
Evil Putin. Believe me, any government will try to make the best out of cryptocurrencies. Any government will observe the econimic reactions from it and I guess, Russia is open an economic window by cryptocurrencies e. g. for trading and worldwide financial transactions. If Putin regulates cryptocurrencies, then to not allow capital flight. But international investment will be allowed, for sure.