A forum poll might not be accurate enough to reveal the reality, because many people don't answer them and a higher percentage of crypto adopters should participate in order to collect enough data to reach a conclusion. Despite this, it's well known most crypto enthusiasts are from millennials' generation (1981 1996 birth date). Youngest generation isn't too interested in investing money, it seems. At least for now.
I have no professional investigation on this issue, but one thing I can be sure of is that the most authentic data for KYC-certified data should come from registered users of centralized exchanges.