Why are you basing your happiness on whether or not you are a millionaire, that is silly. There are so many more worthwhile things to pursue than just the acquisition of money such as the pursuit of noble causes and helping others. This is the only sustainable source of happiness and being a millionaire of itself would certainly not make you happy so you should not wake up feeling depressed every morning for this, you should wake up every morning and think how you could make the world a better place for both yourself and others in your own little way, that will bring you far more happiness than a pile of meaningless paper or numbers on a screen in your possession.