I don't think there will be any time of your life when you feel that you have achieved all of your life's goals and there is nothing more to accomplish. When one goal is met, the confidence and satisfaction of achievement give birth to another higher goal. It is Human Nature. The increased self-esteem due to the achievement encourages a person to aspire higher.
Human wants are like tides. Sometimes, these wants may be subdued for the time being due to circumstances and external situations, but there is never a moment in your life when you don't need anything. If you really don't need anything and satisfied with what you have, you will become a saint.