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 ?
They think bitcoin to laundry money simply because they are more safe looking at risk taking and they can not control bitcoin, so not all governments accept bitcoin. There's also a lot of negative news about bitcoin maybe it affects their mindset.