why wouldn't a private cohort of unelected and in most cases anonymous individuals with significant and arbitrary leverage over the value of the Bitcoins in you

why wouldn't a private cohort of unelected and in most cases anonymous individuals with significant and arbitrary leverage over the value of the Bitcoins in your possession be effectively the same (worse, because there is no accountability or out of band feedback control whatsoever to stabilize their behavior in the direction of good faith) trap as you fear with central banks who can arbitrarily control inflation?