“Over centuries, many people will be born in space, it will be their first home,” Bezos said. “They will be born on these colonies, live on these colonies, then they’ll visit Earth the way you would visit, you know, Yellowstone National Park.”
“Even if you were to terreform Mars or do something very dramatic like that – which could be very, very challenging, by the way – even if you were to do that, that is, at most, a doubling of Earth,” Bezos said. “Then you’re going from 10 billion people to 20 billion people.”
For his part, Musk tweeted in 2019 that Bezos’ plan won’t work, either, because you’d need to “transport vast amounts of mass from planets/moons/asteroids.”
“Would be like trying to build the USA in the middle of the Atlantic Ocean,” he said.