Do you know the saying "Don't bring a knife to a gun fight"?

Imagine hearing someone answer "I'll do it anyway"

I thought of something like this at one time for soccer bets but never tried. Regarding the roulette, with only one zero, one system that used to work ok for me was tracking streaks, let's say 1st Dozen not hitting for 12 spins, in this case odds might be in your favor, so you can do a short martingale betting on 1st or if you want to be more cautious bet on 1st and 2nd for eg. If you win walk out or at least hold you initial money.

I don't know if this will interest you, but I wrote a post about how to come out ahead on sports betting at freebitcoin. They use an uncommon odds mechanism and it offers better than fair odds to early wagers.

I've also made use of the exponentially escalating wager strategy that you describe. As long as you're patient and willing to mostly just make very small gains, it's ok. If you chase returns though, it leads to complete ruin very quickly.

I have known two gambling addicts who have ruined their life. The one addicted to slot machines at least could own up to it, and was able to be honest about their addiction with their family, and recognise it was a problem that had ruined their life and severely impacted their family. The roulette player is still convinced they're one small tweak away from having the perfect system. I wish you all the best luck.