When does government control at least some of the Bitcoin activity? When it is public, right? Like Coinbase, and their relationship with anybody who uses their system.
But you and I can transact privately in Bitcoin, and nobody in government might even know about it. If there isn't any memo in the blockchain record, the reason why we transacted is known only to the two of us, except when we make it known to others. It's private, between you and me, and nobody can interfere, not even government.
They want to get involve in every transaction so they can still taxed it. Where money flows, government always want to find away to chip away something from it. That's the point of Bitcoin just to perform person to person without any person in the middle. However, there's just a great risk of not verifying if the transaction would be legitimate and the reasons for transaction is for good.
The point here is cryptocurrency as whole remains double edge sword. It can erase someone's whole asset if they don't be careful, and can also 10x or 100x their invested money if putted the right action in the crypto space.