Let’s be honest
There isn’t a strategy where the house lose. Albeit, the house always win.
It’s game of luck and nothing else. So working with probability is a better strategy if it may be said.
There is no perfect strategy, which is true, but the truth of the matter is if you are gambling without a strategy at all, you might end up losing more than you would have lost when you are using a strategy.
In this case, we are talking about which pattern could help you reduce the amount you could possibly lose under a given period of time, which depends on who the gambler is. Some, when they are using a strategy, even when it's not working, put too much confidence in it and lose more, while some, when they don't have any strategy, gamble with limits.