So my question is - How much winning is enough for you in a day. You're answer should be based on your capital not on your multiplier. Also how much is it for losing?
The truth of the fact is that when it comes to gambling, it's multiplier is far more important to gamblers than the capital been used itself. Because it's not all gamblers who has large capital and don't mind risking $1000 or more on just 2 odds to win $2000 and then stop for the day. Because the majority of gamblers who probably occupy 99% of the gambling population, what they always do is stake low with a huge odds, with the hope of getting lucky one day to hit the jackpot. Hence, when it comes to me, I will say that if eventually I'm able to get 10x to 50x of my stake each day, that will be totally okay by me, irrespective that as humans our needs are insatiable.
Good as you stated clearly in your last paragraph that human want are insatiable. its because of desire to make more money that attract men to gambling, some one that earns huge salary of $5000, would want to play gamble to double his source of income, while those that wish they could have a job that pay $100, are also using their money to gamble just to double what they have at hand. Human is naturally greedy, and also want to achieve more.
There is not amount that is enough to win a day, even if you win $1.m, it will not stop a gamble to stake more. The only limit we have in gambling is the stopping when you are losing much. You have to stop and take break, then continue again. But if you are winning it will be hard to stop.