Not if all the capitalists get their shit together and see that short term profits aren't worth the mid term extinction of humanity.

Which should happen any moment.

Aaaaaaaany moment.

Self preservation is a strong motivator. It just has to make the right people uncomfortable enough to take action.
They’d rather self-preserve themselves to Mars than do anything that could self-preserve all humanity

Even at +4c there will still be plenty of “nice” places for billionaires to fuck off to and build a nice little rich people commune. Hell, a +6c world is still the garden of eden in comparison to Mars.

Yes there’s a lot of interest in Mars right now, but it’s really is just mega rich nerds. Hell, if I was mega rich, I’d make an aerospace company too, space is cool.

The rich peppers are buying up land and building compounds in climate safe havens, like New Zealand.

Humans on Mars seems to be a pure fantasy fueld by old SF. Technically it seems to be easier (and more viable) to build floating cities on Venus than for humans to live (on the surface of) Mars