There are so many possibilities in here if the cryptocurrency will remove or replaced FIAT currency there are some people that doesn't want to use it because they don't know. There are some good deeds it can provide like the faster transactions to any people who use it. But before that happen for sure it will gonna be world discuss.
Cryptocurrency are introduced in the market since 9 to10 years ago. It has much more advantage then that of fiat currency but still has many demerits. Crypto currency are digital in nature and an stable Internet must need for ot assess but in many places Internet not available. Because of this its not useful in those places. Another thing it based on an complex algorithm and because of this many people doesn't understand it so doesn't believe on it. Its volatile nature is also creat problem in its progress and because of decentralised nature it is ban in many country.