Money can't make you happy. Only the stuff you can buy with it, that is also for a short period of time until it gets boring and you want something new.
The money it self can't buy you happiness, it can buy you the: accessories, electronics, cars, houses that will help you feel happy.
But the happiness, it self, could be achieved with: doing stuff, being active, live life to the fullest.
So, yes, money can make you mean, but only if you have plenty and the 1 billion dollar worth company that gives you a stable income.
(Learning this in debate class, and in a course I am taking outside school).