Holding onto something that is good for you now, may be the very reason why you don’t have something better.
Appreciate what you have and where you are, and go look for change, go make something happen. We know there is no such thing as a static life. You either disrupt yourself or the outside world disrupt you; and It’s better to disrupt yourself. Change is hard, change is uncomfortable; and we are not trying to be comfortable, we are trying to improve ourselves into better people than we were yesterday.