reports measuring the volume by countries always state China, Korea and Japan in the first places also we can't except a large adoption there, by the end, it's a small island compared to china.
It has 125 million people earning around ten times more than Chinese people. You're hard to please.
China is long gone. Korea burnt itself out, is also a closed market so no foreign money can get in and out, and it has been another one with zero fees which makes volume meaningless.