We wil never colonize space until we figure out zero point and anti-gravity. There are those who have and they come here frequently. From whence I do not know yet. When I see Elon's rockets I smile - they are from the stone age. We have to get warp drive and learn how to bend space and time.

We are very far from advanced space travel and we may never get there. I love The Expanse - those people have figured it all out. Sadly we're headed for a climate catastrophe - that's our first challenge, and that's where Elon needs to be putting his money and his energy. A single bunker in Montana just won't work for thousands of years while the Earth recovers from what we have in mind for it!