I think that the largest central banks of the world will not support Bitcoin as a reserve world currency. This is due to the high concentration of bitcoins in individual hands, mainly in China. If the majority of bitcoins were owned by the Fed, then bitcoin would become a world currency.
I am of the same opinion that the central bank in the world will not support bitcoin as a world currency. This is because bitcoin is unstable if used as a world currency. Because one of the requirements can be used as a legitimate means of payment between countries, the money must be stable. At least the fluctuations are not too high.