The digital coin is divided into stable coins and Crypto coins so not all digital coins are decentralized. In my opinion it is good to have both the stable and Crypto coins because they are both important for both Investors and tradersI think crypto currency is just like a digital currency that can fluctuates both upward and downward and you earn some certain profit when you trade them , because they usually fluctuates, and some of the cryptocurrency i think is bitcoin , litecoin, ethereum and others , so this are some of the crypto currency i actually make use of and you can trade them