in my opinion government slowly will welcome for bitcoin as one of their economy base.
What makes you feel that? The last thing bitcoin needs is government regulation because it will affect system functioning of bitcoin. Welcoming it would be nice, fucking with it? Probably not.
If there is no regulation I doubt it will ever reach mainstream status. As long as there are ways to stay anonymous and the privacy of Bitcoin which currently is pretty poor improves in the future, those that want to circumvent regulations will be able to if they want to risk it.