for the moment is very difficult for me to get $ 50-100 a day when gambling, it may require special expertise
Lol, it's not special expertise. But you need to make business and do something instead of gambling.
50-100 USD a day is quite good money if you earn it by work or from your own business.
Gambling will make you lose if you think in that way.
I have never heard about this to anyone living from gambling .. besides the casino owners
Gambling sooner or later brings people into ruin and it is checked. I do not know anyone who would get rich on gambling.