Which of the gambling game do you think that is the fastest in bringing profit base on little time duration
if you ask which gambling game is the fastest to make a profit? i will answer, nothing at all. but if you ask how to quickly spend money on gambling, i will answer all gambling will spend your money faster 
because playing gambling for me is risking profits on online or offline gambling sites and we can't beat the bookies. if we win or hit the jackpot, it's just some benefits like bonuses after you spend a lot of your money however, i have a suggestion if just to get a little profit with fast time you can choose below :
- slot
- sports betting
- bookies dice
You forgot to add Roulette or also Blackjack, that are two valid type of game where you can have profit in really fast time, Roulette especially. Roulette allows to you to have big multiplier with only 1 round (the most important thing is to shoot number which you've submitted your bet
)