Let’s say I bet $10 on black any my wife bets $10 on red. So we are betting a total of $20.
Further assume the spin comes up red.
That means my wife leaves with $20 and I leave with $0. Using the strategy you suggest, it seems we could play all day and simply tread water and spend the day just trading dollars back and forth. Minus, of course, when we both lose when 0 or 00 come up. I cannot see how we would ever walk away as “winners”.
As you can tell, I’m not a gambler. What am I missing?