Some gamblers try randomly when they lose continuously and they try to use the strategy to win and change the strategy as I did while gambling based on previous analysis and observation.
Changing strategy is
just anothera strategy for maximizing your luck factor.
There will be no point of keep trying with a strategy which is not producing profits for you. In other worlds, you are trying to conquer the house and if your strategy is not in your side then you must need to go for a new one.
But, for chancing strategy, you must take a break. Break is for testing your new strategy and once you are confident, I guess there will be nothing wrong on switching strategies.