Some media shows that bitcoin can be the next weapon to control the world economy. i think it is true and it will be seen soon.
For now I think it is not possible. It's influence is not wide enough that we could say that it will have a large impact to the world's economy if there is a price movement of bitcoin.
As far as i know bitcoin is using legally in many countries especially in my country every person is now using bitcoin there's no restricted from government side.
Good for your government but many country in the world still thinking bitcoin is illegal and used for criminal activity. I think its hard for bitcoin to control world economy because the supply is limited and still not recognized by many country