Fiat and crypto currencies have two major features in common: they can be used as a store of value and as a source of payment. However, fiat currencies are backed by governmental authorities, while cryptocurrencies are powered by its underlying technology – blockchain.Many believe that cryptocurrencies will become a viable alternative to the traditional fiat currencies. A crucial aspect of a cryptocurrency is that any person, anytime, anywhere can spend or receive it without any bank or central authority involved. As a result, they have been used by organised crime to hide and launder criminal proceeds. There have also been numerous hacks that have allowed cyber criminals to steal crypto cash from digital wallets.Fiat currencies are affected by inflation and central banks can print more of them if needed. The number of bitcoins is limited to 21 million units, which makes them a scarce asset, like gold.