Never. Even if I decide I have all I need and start helping others, I'm still doing it for my own reasons.Okay, at what point do you stop putting your happiness/ well being above that of others?
When you're comfortable, when you're rich, when all the competition/ possible discomfort is eliminated?
For instance, suppose you're sitting in a field with your wife and children when a live grenade is thrown right into your midst. No one else sees it. You can either jump on it and save your family, or jump away from it to safety and condemn them to death. Either decision is done for your own reasons.
Personally, I don't think I could live with myself if I didnt try to save my wife/kids. I'd either jump on the grenade or at least try to grab it and throw it away while placing my body between my family and the grenade.
Does this mean I'm not looking out for my own interests? Of course not. It just means I value some things more than my own life.