Most gamblers especially those who are gambling in lotteries only stop when either they have won the jackpot or they don't have money to gamble already.
If you are gambling in lotteries, I think you need huge amount of money if you really want to win into it especially the chances of winning into it is close to zero but if you are a lucky one then it can change your life. When you are gambling in casinos, still you need huge money in order to win huge.
it does not make sense then if you gamble with a verry large capital but the odds of winning it is too high that its likely impossible to hit it on your lifetime because it will only eat up your balance. smaller bankroll does not mean that they dont have a chance to win those biggie's . other small time gambler on the past already won huge but this does not guarantee them that they stop because some of them still continue playing in the hopes of snatching another jackpot again . big or small amount , gambling is just hard to resist .