That's for all those fusion plans we are prepping, right?
So we should colonize Mars because at some point, thousands of years from now, it might have an atmosphere. Like Antarctica.
If and when those are built.
You do know what terraforming is. Don't try to paint me as claiming that Mars would someday spontaneously develop an atmosphere.
I can't think of a way to make Antarctica more than marginally habitable without wrecking the rest of the Earth, but I can think of ways (albeit insanely expensive ones) to terraform Mars.