For me, there is no such thing as winning fast in gambling, be it online slot gambling or at the casino. It's all just luck, maybe if soccer bets are a little more likely to win, and even then if players understand the condition of the team and the quality of the players competing.
when you say slots for sure this doesn't count because they won't give you big profits if you are not lucky there and only lose and lose 
Slots is not a game for profit but for fun due to the fact that when it comes to profit obviously Dice or Roulette is better in my opinion.
But we know luck only comes to the right people and deserves it, while others only get defeated.
Slot games depend on luck, while Roulette also depends on luck.
Maybe sports betting can be said as a gambling game that can give or make money but still, it is not a gambling game that can provide the fastest profits.
Luck will come to anyone, regardless of anyone. But luck will not always be there, there will be many failures as well. Slot games only rely on luck on the slot system, while for soccer sports betting there are several predictions that can be made regarding players, player formations or other factors that affect football matches.
By having predictions about each player, we may have a higher chance of winning than slot games.
So maybe if someone wants to win, he can try to bet on sports but the condition is that he must have good predictions to choose a team or player that can give him a win.
But be careful in every gambling game because not everything that looks easy can give you a win.