so i think this is the money or btc addiction which says gamble with your money and get a big profit wjich is not so easy .
You are pointing out that only those people are gamblers who have a good income, like you are saying that only rich people gamble, which is not correct, you can notice on any casino that different type of people are there to gamble and most those people are there who do not have a good income and want to increase their money with gambling.
Agree with you , a number of people who do not have much money also gamble and most of them gamble because they think that the rich people on gambling are rich because of gambling, so these poor people also invest every earning to there to get some money.