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 ?
It is. But things might've get worse if they did because, you know, they just can't prevent people doing crypto. Of course, crypto wouldn't be so global but the illegalness of it wouldn't do any good.