Replying to Possible Moneymaking method for Roulette?

now I'm not claiming this because im sure its been done, but i thought about it at work. u go into a roulette table with a minimum bet of 10 bucks and bring 150$. You pick one color and that will be your color for the night, can never change. you bet 10 dollars the first hand, if you win, you keep betting 10 bucks a hand. If you drop to 140$ double up your bet, lose to 120 double up your bet, lose again ur at 80 and u go all in. odds are 47% on your color which is basically a coinflip, those 2 green bastards on the table fuck that up a bit, but youd have to lose at least 4 in a row to bankrupt which is highly unlikely, but it can happen.