So far, fiat by the government is more superior in most countries. It is centralized, issued, and regulated. It is legal, to be used for payment, and other transactions. Of course, everyone will use that fiat in order to do many things, especially in that country.
However, the crypto may have little bit effort to be able to accept in certain countries. Many countries still don't legalize or still ignore the existence of cryptos.
In this situation, many cryptos are decentralized, but some are centralized. The problem is sometimes the government doesn't like that crypto is there because of some issues.
however now, many more people and governments also open with the existence of the crypto world. The existence of Bitcoin moreover, can enhance the use and utility of the crypto. And this is not about power, but about its acceptance, utility, and also development.