Ask a million people, get a million different answers.
IMO, we live in order to reproduce, just as our parents and our parents parents did. There is nothing else to live for - our purpose is to perpetuate human kind by creating new people. Every event from birth to death is simply a theatrical performance, we meet new characters, have fun, experience drama and love and feel pain and happiness, to name a few. However, without a legacy, it is all in vain (and that especially includes making money).