I don't believe that any government can "get upper hand in Crypto".
It is way too late for that. That "cat is out of the bag", so to speak.
There are several nations that are considering abandoning their own fiat currency and going with crypto as a national currency. The inflation rate in Venezuela is running 24,000%. Their currency is worthless. The citizens are burning piles of their money in the streets, daily. And the situation in Argentina is deteriorating also. This is why Binance is opening a new exchange in Argentina, to serve the local demand which is increasing radically.
Crypto is most popular across Asia. In 2nd place is Europe, and the USA/Canada is in 3rd place. But the biggest market expansion is in Central and South America, because of the concentration of wealth, the failure of the financial markets and the permanent and overwhelming poverty.
I just read an article that China is considering outlawing crypto mining, and possibly outlawing everything crypto. I was very surprised at that because I always though that the Chinese government was too intelligent to do something so stupid. But you never know...
If the US government were to try to control crypto thru regulations, etc. it would most likely fail. It might turn every US crypto investor into a law breaker and an outlaw. Worse case, that would give the US Gov a very convenient "legal" pretext to confiscate all of the crypto held by US citizens around the world. I think that they are going to need to try this inorder to pay for the next World War, now in the planning stage.
Personally, as a US citizen since birth, I will never underestimate the insidious nature and evil intent of my government. I have witnessed way to much crap to think otherwise.
This may sound like hype, but I really do believe that crypto currencies are a world wide unstoppable revolution that will permanently change the world, hopefully for the better.
Of course, there will be blowback and resistance from "the establishment" who want to maintain the status quo. And we already know that the US Government has been bought and paid for by the rich and powerful, and that it is no longer OUR government ("Of the People, By the People", etc.). Sad but true. The US Government is neither our benefactor nor our protector - it is our universal adversary.
Good Luck.