although bitcoin is not yet adopted by majority of people, i believe that it has the potential to become much more successful that what it is right now. and eventually it can be a substitute for fiat, or at the very least it can be as useful as fiat and exist side by side with it.
Although its being adopted by many people bitcoin will never replace fiat because there are so still too much lacking in bitcoin technology. IAbout the system it still can be hacked too. How are you going to anticipated that? There are still many reason why bitcoin will never replace fiat
well, bitcoin is in its early stages. and since it is a new technology it will take longer time to become flawless. you can't expect it to become wide accepted when it is practically a toddler in comparison to other currencies which were around for many years.