Bitcoin is a digital currency that was created by Satoshi Nakamoto in 2009.It is created electronically and impossible to control it.This currency are not printed currency like dollars or euros.Running computer all around the world are producing it.Owing to this reason they are different from other currencies.
Cryptocurrencies is a lot better than fiat especially that the number of online transactions are getting higher as our society approach a more technology dependent economy. in that type of market, cryptocurrency is more practical and efficient since there are no other layers that slows down the transaction. Hopefully in the next years, everyone else will realize this a start using it.