What percentage of bitcoin investors are gamblers ? Where will this figure be if we consider worldwide users ? I think it will be somewhere between 10-20% ? Also, it is possible that most of gamblers are still not bitcoin investors ? I see less chances of the later happening.
I'd say it's a lot higher, and even more when you include all of crypto like altcoins and nfts. I mean essentially with how volatile those are you can say it's actually a form of gambling so that 100% of people that "invest" are gambling. Either way I'd say it's way higher than the 20-30% range even if you don't consider crypto gambling.