Bitcoin has build a strong economy around it, nowadays around 1500 coins are around due to the big sucess of bitcoin, wich were the first coin to get live and reach sucess. No mather be the most important people in the world at bitcoin no one cant predict its future, since its the people money over it.... if banks wanna to control it they would need to invest and what would be their interest to play against others banks.... the thing is bitcoin will remain live as long people still need to protect their capital from the country, since we do pay a lot fees wich arent being used at all... soo bitcoin is a solution to those system wich need to be more transparent with their people.