Bitcoin is neither to fight corruption nor the way to launder money. It is totally dependent on the users ,who use it. Some time in media it is said that bitcoin will be ban because of money laundering, terpor funding, hiding tax etc. But by banning bit coin situation will not be change . They ,who does the crime will certainly find a alternative way. We have to stop the action not have to ban the tool.
All States will never agree to ban the use of bitcoin at the same time. Those who impose such a ban will lose their income due to the fact that people will withdraw money in that country that do not. I think it would be Japan and Switzerland. Japan is always the first in the world adopts innovations. Switzerland is happy to provide its territory for investments.