Do only 50% bet 20$ every time if it fails do 60$ it fails do 150$ if it fails do 350$ if it fails do 900$ if it fails do 2300$
There is no way you will fail 7 times and if you do just increase the bet and you will get it back eventually even if you wait 12 times.
what you think on my method?
You are a genius. I hope that you become a millionaire with your newly found method that nobody knows about.(martingale)

Actually there is a way to fail, because the game outcomes are random and everything is all about luck(assuming that the game isn't rigged).
Try to find another method to "win at gambling every time". So far I have never seen a casino going bankrupt because one or multiple players are winning all the time.

Maybe you will find the "golden gambling method" that wins all the time(but you will have to keep it secret, because the casinos will ban you, if they find out). Keep grinding.
