Personally if I want to turn a small amount into a quick x profit for fun I do,
10$ into 5-10x I see the most success I have with games like Mines.
I try avoid slot games with low budget, what is your "safest" game for you that you feel lucky on, and have most fun with?
The only ones which I have tried and could possibly give me the chance of such multipliers are either crash or plinko. I would rather to go for crash instead of plinko, for some reason there is more excitement with crash, since you are not "gambling alone", as you can see what other gamblers do with their wager and when they decide to cash out their money.
I have always had this feeling plinko drains one's money faster than other games like crash, in which the multipliers also depend on the choices which are made by the gamblers themselves, that is why I also like blackjack but there is no way one can get such a high multiplier out of a single round of blackjack, obviously.
Ironically, the safer a casino game feels and the more one partakes on it, it is more probable one would end up with no money.