In the long term we are talking about house edge and as long as there is a house edge the gambler is doomed to lose money. You can make a quick buck, and maybe you could make a quick buck back to back, that seems like the only possible method to make money honestly.
In a sense it is clear that no matter which casino you got to and which strategy you use as a gambler or an occasional player you're deemed indeed to lose at some point even if you probabilistically happen to win at first. The reason for this is simple - house edge.
Of course, this doesn't apply to casinos whose algorithm can be exploited and manipulated such that you always win even after considering the house edge.
What some of the addicted gamblers who are trying to achieve (and fail miserably) and say that "some guy they know does it" (which is a lie by that guy as well) maaaybe they could just play a little, they do not have to gamble too much but just a little.
For example, how much would you need for living? Let's say 100 bucks a day? So, you do martingale for 1 dollars, ideally you make 100 in a row but we know that is not going to happen, you put in money there and continue to gamble for 1 dollar per bet and if you win you got it, if you lose you double and in the end if for 100 dollar profit there is no 10-20 times loss you will end up with your 100 dollars.
Some days you may end up losing a lot of money, some days you may win and in the end if winning days outpace the losing days, you will be in profit. However what they fail to realize is that, when you lose, you lose big, and it is hard to recover.
