I also often hear myths like that, lose several times and win, I think it's ridiculous and unsettling, I hope such a strategy can be lost, But if you think about such a situation is not a myth, it is more directed to the city strategy, to try and try again to place bets.

Such situations are often encountered in roullete, yellow, white and brown games, five times the sixth yellow white, and so on.
It seems that the myth is like a strategy, it has been set by the dealer, it looks like the strategy will not be eliminated, that's the way the dealer collects a lot of money.