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 believe that bitcoin can not be backed up in real money, you can see that the number of bitcoins in the world is very small and it is not enough to meet the needs of any country. Bitocin prices also fluctuate very strongly and in very large amplitudes. Therefore, I believe that bitcoin can not become a currency and bitcoin can only be used as a means of exchange for keeping altcoin and USD.