If the Red Planet (Mars) is habitable, how will the over Seven billion people get there? What is NASA really up to?
Maybe one day humans will build domed settlements on Mars but we're still a long way from doing that. We have the technology to get people to Mars but haven't yet built a vehicle capable of doing so.
We wouldn't be sending billions of people to Mars. For starters it would be astronauts and scientists. Permanent human settlers on Mars is likely many many decades away (if ever).
And you think that would ever happen in our own lifetime? I doubt it