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NerdyPotato I'm not so sure. We have resources here now that we won't have on Mars. Now of course we are eventually going to run out of mineable and drillable resources, that's a given. But like, wood, paper, sand, glass, aluminum, steel, cardboard, plastic, there are a lot of things we can gather and then create from what we've gathered. You can't do that on Mars. It's a barren planet.
We would first need to establish a way to survive, a way for a mass population to survive, and if we did figure out how to survive there, we would have to take resources with us. The only problem is those resources are non-replenishable. Let's say that we've done everything right, millions of people now live on Mars, I am pretty sure we will be transferring resources from Earth to Mars. Sun explodes no more Earth, no more resources to Mars. Unless we've advanced so far past that, but I highly doubt it.
Until greed, hate and power no longer exist, we won't achieve any of these illusions of grandeur.