Well, if you have a shitload of money, you can always double your bet. this will result in you ending up with winning all the money that you have thrown into it back + the amount you started with. it's similiar to what you already wrote, but still quite different.
let's say you want to win 4M. Start with 4M obviously, if you lose simply make it 8m, you lose make it 16m and just continue like this till you win. lets say you win at 32m and you will still have made 4m from where you started. now just start over again and make dem gainz! though if you lose 10 times in a row, you're pretty fucked if you're not some rich bastard haha.
i used to do this with dicing back in the day with just 100k each time (just to be safe), and i made millions an hour no probs. it's smart but also very risky if you end up with a big losing streak
btw this method is perfect for staking on max mains cause of the 50/50 win chance