Control is such a strong word. Besides, who said that they don't have "control" already?
Look at all the normie hedge fund managers, trusts, politicians, news reporters, celebrities and big banks?
trying to enter that are already in crypto.
When big institutional investors join crypto, everybody goes batshit crazy like it was actually a good thing - and that's because everyone's focused on the price. In all actuality, the government doesn't need to control Bitcoin itself - it just has to manipulate the greed of people and people are more easily controlled than Bitcoin the technology, the code and the system.
Look at Coinbase and IRS issuing those tax notices.
Every government will try to milk every cent from every gain in every territory they own in every citizen that claims to be a member of such, regardless. This is the very definition of a government - a coercive power that will do whatever it wants, using whatever resources necessary for as long as it can. Why?
Because it can.
Now, let's reverse it a bit and say that "the Government is NOT trying to Control Crypto?"
It's got other things at its focus right now, and that's illegal immigration, trade war, national security concerns, opiod epidemic and such.
To the government, Cryptocurrency is interesting. But governments are letting them simmer until it reaches the boiling point. Look at Trevon James of Bitconnect fame - he's still running around posting youtube videos like an incompetent weather reporter right?
Ask yourself "Why?"