In my opinion there are no chances to live in a world without classic currency. As I know Sweden does not have cash money since two or three years now, but for all the money to be replaced with crypto-currency, this is something that governments should impose. Bitcoin is beginning to be very accepted in Asia, but in Europe and other parts of the world there are many things to be done to be accepted. Here where I am there are no physical shops to accept bitcoin. So in my opinion the chances to live in a world without classic money are very slim.