BTC is that type of currency where there is no governing body over it and it itself regulates it's transactions and because of no controlling authority over it, some social deflauters tries to misuse it and uses BTC for the illegal activities like terrorism and bribe killing and many more and this is the reason why government has banned cryptocurrency and even they are demotivating people not to use it because they could not put their national security in risk but as soon as BTC will be centralized, this issue will be sorted and then everyone can use BTC without any risk.