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 ?
I do not think it is technology that threatens technology. You thought too negatively about it. Blockchain technology will even help improve the banking system and they can work together to better serve their customers. And it's not a nightmare for the government!