How about "Money!". Glibness aside, it's a private enterprise and is profitable, so even without mentioning Musk's ultimate goal of colonizing Mars, its existe

How about "Money!". Glibness aside, it's a private enterprise and is profitable, so even without mentioning Musk's ultimate goal of colonizing Mars, its existence needs no further justification. It makes money and its shareholders are happy. And before someone jumps in with the "SpaceX-is-propped-up-by-the-government" canard, the U.S. government also saves money when it launches military satellites with SpaceX. According to [1] (among many other sources), SpaceX quotes around $60m, compared to the United Launch Alliance price of about $125m (or even, depending on how you count, $200m). [1] http://arstechnica.com/science/2016/03/ula-executive-admits-company-cannot-compete-with-spacex-on-launch-costs/ http://arstechnica.com/science/2016/03/ula-executive-admits-...