If you allow bitcoin, the economy of weak countries can collapse. Why work for not a stable currency if there is a bitcoin? The world will be chaos.
There will be chaos if the government will take proper laws regarding cryptocurrency. This allows you to control cryptocurrency. And benefit from this and get people and government
It is because bitcoin creates by binary program only. It is not totally illegal it is half legal because it is created by satoshi nakamoto. It is also for good money transaction in the internet which you can get bitcoin over the faucet and forum or given to you by your campaign if you have.