[dtwest]

According to the Federal Reserve, China's money supply is larger than the US. GDP levels don't directly map into money supply.

https://fred.stlouisfed.org/series/WM2NS https://fred.stlouisfed.org/series/MYAGM2CNM189N

The more interesting theoretical question here is whether BTC should be compared to M1 or M2 (or another metric entirely).