At a traditional bank you have your national deposit insurance scheme; you get that in return for converting your "assets" to the said nations issued currency but accept the authorities control of the money supply and your funds.

With decentralised money, you get the safety of a globally distributed attestation backed by cryptography without a single authority controlling the supply of money or your funds.

There is no halfway option. You either have a single authority that can exercise control or you do not; number of delegates for exercise of control is almost irrelevant since you can change banks.

Currency isn't a homebrew computer or backyard car project; it is either centralised or not; there is no in between.

Blockchain with central authority is the worst of both worlds.