I am not against Mars but I just think it’s premature. Build up robotics for a while and Mars will be much easier. There is no rush to become a multi planetary species. There is no credible threat of a big asteroid or volcano in the next decades. All threats we may be facing are self made.

My favorite moonshot project would be to create robotics that can clean up the environment and handle recycling. Having the technology to pick up dog poop and plastic bags in an efficient and affordable manner or separating recycling items would be a huge technological challenge that would create a ton of spin-off opportunities including a base on Mars. Or clean up the pacific garbage patch with robots.