Those who advocate central control are snake oil salesmen. "Does this oil cure warts? Of course it does!! Dyspepsia? Absolutely!! Cancer? Why, we have just the thing for you!"

If your primary goal is to sell something to someone, then you have to convince them that your product is the answer to their problems. Whether or not it actually is becomes irrelevant.

Hiring someone who is supposed to provide answers has a built in conflict of interest, which is that they will give you fake answers that don't require hard work to create rather than real answers which do, and all of the motivation is for them to try to convince you that their fake answers are real. Giving control to these people is dangerous because they will use their power to convince you that their answers are real, and that includes using the power they have to declare some experts as expert and some as frauds, which means they have taken over the power to declare what is true. At which point you have lost the battle. But never the war, because true reality will always win over fake fantasy.

The good thing is that truth remains truth and reality remains reality no matter how vigorously they contest it. The bad thing is that the further they steer society away from balance and reality, the more people get damaged by the violent snap back to alignment with reality. Our goal is to avoid getting whiplash when this snap back occurs.

Thus it doesn't matter if they institute a central bank for crypto. They can't control real crypto any more than central banks can manufacture real gold. And there is a certain comfort in that.