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 don't know where you got your stats from but I can tell that there are more bitcoin Holders who gamble. Gambling can be a more enjoyable thing using crypto. Everyone who gambles on this forum have Bitcoin or uses cryptocurrencies however not everyone one on the forum gambles despite having Bitcoin.
In fact, it is really difficult to figure out the statistics of bitcoin investors and gamblers. You are right there are many investors who gamble and many gamblers who invest in bitcoin. Gambling is a good investment true both investment and gambling involve risk and choice especially capital risk in the hope of future gains. Goal Gambling is usually a short term activity while bitcoin investments can last a lifetime. The risk is low and many investors prefer to hold bitcoins rather than lose them gambling. Also gamblers have negative expected returns in the average and long run.