I just wonder how bitcoin really works on local exchange around the world because if you will going to need a real money and you have bitcoin definitely you can sell your bitcoin and exchange it with real money in your local to be used. Well if all people around the world would exchange their bitcoin holdings is it possible because bitcoin is being back up by real money?
I think that is absolutely impossible and if it happens, it will take a long time, take a lot of time. You can see that bitcoin is not controlled by a government or a state, so it is very difficult to trade successfully when the bitcoin price is not controlled and shark-dominated.
In addition, the number of bitcoins is limited so that bitcoins are not enough to meet human needs.