Sanctions are inevitable in this case. Russia and China can't expect they are going to keep their deals in secret while still maintaining the harmony with the rest of the world, especially with the occident. USA won't be fool to let their main adversaries continue growing protected by a bilateral p2p agreement. Understanding the analogy, bitcoin itself isn't the problem for people like Putin and Xi Jinping. For them, the problem is that bitcoin is open and free for everyone to use, doesn't matter who you are, while in fact they would like only themselves and their allies should have access to it.
Then they should know how a powerful tool Bitcoin can be against censorship-resistance if everyone has access to it, but does China truly understand? Because if they did, I believe they would never throw their advantage in the industry by banning POW mining, and trading.
This is a very misterious and shady subject. It's interesting, however, that China has banned bitcoin mining only now, when more than 90% of the coins are already mined.
Maybe it was just a smart move to concentrate their national energy consumption in another sectors. But I believe soon they will change regulations to allow proof of work currencies mining and trading again, as it was already cogitated some months ago by chinese authorities.
Sometimes they seem acting foolish, but I then I realize I might be the foolish one by underestimating them.