Yes, it can be good sometimes. But this is a personal thing, depending on the gambler's own characteristics. Some people prefer to cash out early and feel comfortable doing so. It depends on what makes you happy when gambling; it's not always the fear of losing everything, but something already established from the start.
I believe that patience is absolutely important in life, whether in play, at work, or in personal relationships. It's not just a question of when and how to cash in, it's a way of life.
Rushing and being impulsive leads to nothing but making mistake after mistake.
Patience is important in life so that people can think things through before making decisions but there are times in life when you need to make quick decisions. Being patient in gambling is not a guarantee that you will win your bet likewise making a quick decision on whether to cash out or not is not also a guarantee of winning. So a bettor needs to think fast when presented with the option of cashing out whether to take it or not. You need to decide what you want and stick to it and you should accept whatever outcome you get, don't blame yourself if you lose because that same strategy can give you a win another time.