Agree, the government is the biggest threat to bitcoin, the second threat is power shortage, nor electricity-no bitcoin 
Why do people keep on thinking that the government can ban bitcoin? To ban bitcoin, they will have have to ban the central authority in their country. But bitcoin is decentralized and has no central authority. To ban bitcoin, the government will have to "ban everyone" that is helping the bitcoin network stay active which is impossible. If it was possible, wouldn't the government all around the world already put a ban on p2p torrenting? Secondly, the government can't suddenly tell its people to stop using bitcoin and abandon everything they have.
They can do it, if you are underestimating the capabilities of your cy then you are dead wrong, they have the ability to ban websites and services that are connected or even acquainted to bitcoin if they want. There might be some that will slip through the cracks but the witch hunt will be unforgiving if they want to and financial institutions will be in support of the government effort to eradicate traces of cryptocurrency because it is a threat to them ever since.