Take a look on North Korea and their internet. It is limited, it is controlled (lol).
Their internet is highly censored. The pages you can visit are limited, let alone the services that accept Bitcoin. There is no reason for a totalitarian government, of that level, to get involved; they already control everything.
Even if I had high chances of getting away with it, I wouldn't even try, because there's a small chance I won't have a head afterwards.
If Russia does another stupid act and blocks its citizens from accessing the Internet, it will be basically a problem only for Russian citizens. The world can do without part of the Russian cryptocurrency market, and for the Russians who worked in this market, it will be just a disaster. And in general, in my opinion, few people can imagine their life without the Internet. Almost all the knowledge of mankind is already concentrated there, this is a way to instantly spread any news around the world.
That is why the Putin regime decides to take such a step, he wants the citizens of Russia not to know the truth about the causes, course and consequences of the attack on Ukraine. This is, of course, stupid. After all, there are still mobile phones, but insanity in Russia is so strong that they can be reached there.