Elon Musk, the billionaire founder and CEO of the private spaceflight company SpaceX, wants to help establish a Mars colony of up to 80,000 people by ferrying explorers to the Red Planet for perhaps $500,000 a trip.
(...) we've put all our eggs in one basket. If we were on many worlds and were to mess up down here, there's a way for the human species to continue. I don't for a moment propose that the Earth is a disposable planet, and we have to put enormous efforts into making sure we don't muss up down here. But there is a chance.
Never forget opportunity costs of limited resources. To use a different example saving cute puppies isn't something anyone is against, but there's a question when one has limited resources of whether giving money to animal shelters is a the best use of it.
It is private resources and a relatively low amount as well so this is baarely applicable here. It is obviously not the optimal use of resources (because we probably can't even calculate the absolute optimal use of those resources) but if they are doing anything even slightly positive we should be for it and most will argue that this is a highly valuable endeavour for humanity (even if we only account the amount of useful tech that will be invented/improved during the course of this mission).