Yesterday I earn in gambling is 0.1 btc
and today I lost 0.2 in poker and sport betting.
That is the reason why no one say exactly say if how much they can earn in gambling because if you win now you will lose again later and in place of getting profits you will pick up loses in it.
No one could able to say on how much they can earn with gambling since you dont win all the time for you to able to calculate as expected we suffer more lose than winning which is reality on gambling field. You wont win anytime you may suffer also lose in every bets.