We all need a certain amount of money to cover our basic needs. The trouble is, the more we have, the more we own, the higher our 'needs' become. If you don't own a house, you will never need a security system or a roofer or a driveway specialist. You may want money to acquire such things.
You may want money anyway, to jingle in your pocket. Some want money because they have low self-esteem and having money makes them feel more important. Others want it because they have always had it in their childhood and it would feel wrong not to have it. Other people are so involved in their profession that, as long as they can eat, sleep and have reasonable accommodation, they are prepared to give up the struggle to gain more and more money.