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.