Happiness is a state of mind.It has nothing to do with what you possess.The more you possess the more you want.Desire is like ghee poured in fire;the more you pour ,more it burns. and demands more.
When you chase money, you can not enjoy it as you are busy chasing it.Others around you only enjoy.At the end of the day you can eat only what your stomach can hold and you can sleep what your body demands.By earning more money,these things do not change.
Ambition and achievements are ok.But at what cost?When ambitions drive you to to the detriment of of your health and happiness it is not worth pursuing.
Contentment is the key to Happiness.