That does not make much sense unfortunately. Fiat is a paper currency issued b governments. Bitcoin is not paper money (there were attempts to mint physical Bitcoin coins but - you guessed it - the government said that's illegal so they stopped), and no government issues bitcoins to the central bank.
The blockchain issues bitcoins to miners though. So in a way, the blockchain is like a government, governed by developers and industry pioneers, and the miners are like the central bank, who then sell their coins to exchanges who resemble other banks, and so on.