Some people study for a job to earn money, then get bored, waiting for retirement to stay at home watching shows and movies. Others make everything they learn benefits in life, they study because they love knowledge for its own sake, they enjoy any moment they read something. They consider money only necessary to meet their basic needs for living. You find them practicing activities and hobbies in which they find comfort and don't stress themselves in a particular job that may be the cause of their misery.