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 it should be publish when it's greatly helps to have a better future of many people? And they are making so much money from it so there is no reason to make it illegal. Some of the users having their own house, cars, businesses and everything just because of bitcoin so I guess that's the government want which is people provide their own need on their own.