As far as i know most of people lose their money in gambling. It is just a very very little percentage that win or at least get their money what invested there(which is better than losing). So i don't prefer anyone to get in the gambling world.
Yup agreed,thats why i'll never recomend my friends to
invest their money on the gambling site,
for me its such a lucky,and i think there is no people getting rich on gambling i mean this rich is about your statisfaction and your hapily about your own money not how much money that you have

If you mean invest in the gambling site like investment, you have to prepare much money as a investors and you will make an agreement about profit with the owner of gambling site. But if you mean playing in gambling site, well you're right partially. Gambling couldnt make greedy people to get rich, but it can for wise gambler.
If no you already give yourself an answer if it is good or not.
If you are gambling already then try to be not addictive and try to leave it as soon as possible.