Bitcoin was the cryptocurrency which came up to get rid of centralized fiat currency... So that it can be only currency which can be used world wide as exchange and yes one day cryptocurrency will change the world
In many respects, BTC still has many benefits for consumers, such as anonymity, fast and anytime, anywhere. However, we also consider that the level of electronic money users is limited. , related to electricity, and machinery, so it is unlikely that electronic money will replace fiat in the future.