I believe that, if our basic needs are not met, money can bring us much more happiness than if our basic needs are met. If someone who is penniless, homeless, hungry, dirty, sick, and unemployed receives $10,000 – enough to eat, go to a doctor, by a medicine, rent an apartment, take a bath, buy decent clothes, and look for a job – he will feel much more happiness and his life will objectively improve much more than if a millionaire receives a billion dollars.

Thus, I would say that the value of money (from our personal point of view) decreases exponentially with the amount of money that we already have. Along those lines, we should give earning money a high priority until your physiological and safety needs are decently met, but after that, focus on enjoying life.