Everyone is trying to prolong their life be it by trying to eat healthy, working out and all other ways. Billionaires just try harder than most because they have the means.

I've said it before and I'll say it again: I pray immortality is never discovered, and too expensive for the common man. It would be the ultimate cosmic injustice for the rich fools of 20XX to cheat the grim reaper, that one great social equalizer.