The only substantial thing left is speculation. I wonder how many people are involved in that. My guess is less than 10,000, which would be less than 0.001% of the population...
Wow, that's a lot of upside! I had thought I was bullish!
I cannot tell whether you are being sarcastic.
Some time ago, Huobi's CEO claimed to have 10,000 active clients. Discounting for hype and adding OKCoin and the others, 10,000 active traders in China seems to be a very generous upper bound. (Of course it can be much less.)
I would be surprised if there are more than 10,000 active traders in all the exchanges outside China. Is there a reliable estimate somewhere?