For sure that the majority of gamblers not only within crypto world but also outside of it do such thing in order to earn money. I am confident that it is the main reason of people even without conducting surveys at all .

In my case, I admit that I also want to earn few bucks every time I gamble but this is not my primary reason, having fun while spending my leisure time does. And I think having such kind of mindset is good after all because it prevents me to become hungry of money thus avoiding addiction .