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.
I'm not quite sure if the change will happen in the next short time, since no one can truly "control" the bitcoin itself. And yet, there is some country that still considering the impact of bitcoin and other cryptocurrencies (whether it is from the dark side or the good side of it), and the policies from each country are protecting their citizen from the risk of losing their money.
But of course, if the government itself are open-minded with the positive influence of cryptocurrency, there will be a chance where bitcoin will take part to control the world economy.
Economy of the world can be controlled by a super power nation that has the power to control world economy because of their economy their currency value is powerfull because of their economy many nation will borrow money from them in form of a loan in the conditions that a certain nations should follow the rules and regulation in their advantages thats why they can control world economy. I dont know how Bitcoin can control world economy but it really influence world economy