M2 is probably not the right number to use. Bitcoin will have an M2 far greater than 21 million. It's the M0 of Bitcoin that is fixed to 21 million. But the wo

M2 is probably not the right number to use. Bitcoin will have an M2 far greater than 21 million. It's the M0 of Bitcoin that is fixed to 21 million. But the world money supply is also much higher than just the US money supply.