The most dangerous moment is right after you win.
You did it. You made the money. You quit your job. You built the physique. You got the girl. Now what? Most people let themselves decline into misery because their driving force has now vanished.
You need another mountain to climb. You need to understand that it is a gift, not a curse, to always be in the pursuit of your potential - the constant balance of challenge and skill is what makes life meaningful. There is no final top of the mountain.