While CRISPR is great, it's no wonder drug. Immortality within a decade is a cool dream but has nothing to do with reality. Also, once you researched a drug, manufacturing it is usually cheap, so it would be a bad business decision from the drug maker to limit it to the ultra rich. But we are getting off topic. I agree with your general point though: with sufficient progresses we'll overcome the challenges of living in space. Of course, humans are built for earth, but it's no impossible challenge.