There are two types of
cryptocurrency Currencies
1st: Centralised
Currency2nd: Decentralised
CryptocurrencyThere is not centralised cryptocurrency i think that also the currencies which has some of the relations with the government are centralised currencies like the national fiat currency you use.
There is a lot of difference between currency and cryptocurrency.
Understand the difference and you will get your answers.
Whole point of crypto was getting out of the banks rule and being just angry about the way governments take care of the way money works. Bitcoin came out as a leftist statement if nothing but without putting much politics into it in general bitcoin came out so that noone would have control over it and people can know and expect what bitcoin will do in bigger sense of the word. Now if take away the decentralized way bitcoin works than there is no point of bitcoin being so successful. It would be just another coin that would be under the control of someone else. Ripple for example has been accused of that for over years.