I'm wondering this because is such a real threat to bank system and we all know how banks and governments are tightly linked !
BTC could make people more autonomous, self-resilient, being their own bank. You can use it like cash, making your transaction almost untraceable (or untraceable using e.g. monero or dash or laundry systems) : this is governments worst nightmare, isn't it ?
Why should they?They take taxes for it.And if Bitcoin and co. get more accepted they will find the way to get even more taxes from us.Just like from stocks/shares,you can´t save it 1 year to get it tax free like 10 years ago,now you must hold it for 12 years.At least in my country.
I´m expecting the same for cryptocurrency.And also more regulations in future