The entire power of the protection racket business called "government" is dependent on the monopoly in creating "money" by fiat, declaring "legal tender", looting the population through direct and hidden robbery (aka "taxes" and "inflation"), and controlling all that by issuing banking licenses.
Additionally, the members of these gangs do all that exclusively through coercion, and assert a natural moral right to do so.
So, anything that threatens that, of course, will be "banned" by them, as soon as Bitcoin threatens their business model significantly.
However, so are prostitution, "drugs", "money laundering", "tax evasion" and many other eternal activities "banned" in most territories, even though they present no threat to the "government" business model.
(On the contrary, those are part of their revenue stream, power and control foundation, in order to be able to declare anyone a "criminal" at any time.)
So, they will for sure ban Bitcoin, once it's a clear and present danger to their profitability, but they will also use it, because it's "criminal money", and they are in reality the biggest criminals at any time in history, and in every culture.
(To kill or rob a few people, takes only one person. To kill or rob on massive, industrial scale, it takes "government"!)
Watch the progress here:
https://en.wikipedia.org/wiki/Legality_of_bitcoin_by_country_or_territory(India is almost 18% of the world population; so, if that ban passes, we're well on the way. That gang certainly correctly sees it as a clear and present danger to their business already. )