For me to compare bitcoin in fiat, gold and other source of currency, bitcoin still has a lot of space for improvement bitcoin hasbit's disadvantage and advantage of course bitcoin only rely in the internet but it make transaction much more easier but fiat on the other hand is tangible it means you can see it with your own eyes and hold it with your own hands and that's what i think why a lot of people still not interested in bitcoin because what they want is the tangible one.