"The solar system can easily support a trillion humans and if we had a trillion humans, we would have a thousand Einsteins and a thousand Mozarts." - Jeff Bezos
"There need to be reasons to get up in the morning." - Elon Musk
I came across a video of Jeff Bezos, Sir Richard Branson and Elon Musk discussing the possible future of humanity in space posted on the Facebook page: "Our Future in Space." Though I checked (Googled) around, and even checked "Tech Insider" on Youtube where the original footage is credited as coming from, I couldn't find this exact video outside Facebook.
So... here's the link to the the Facebook page of "Brutamerica" where, perhaps, some page admin there put this video together. Go ahead and ask them who put it together if you'd like.
If you are interested in a hopeful future for humanity, you will appreciate what these three good people say here:
Image: Iapetus City, Saturn (clear sky)
Photoarts by Gregory A. Smith (Gzen)
The image is a mosaic of a NASA/ESA Cassini image of Saturn and my photograph of a city skyline at night.