It doesn't matter so I might as well just enjoy it and do pretty much whatever the fuck I want while it lasts while I try not to worry about anything (as humanly possible as I can).
If I end up dead before I hit 30, piss poor and in the streets, or over 90 and rich, I will be dead anyway; the planet and the universe will continue to exist with or without me like they have been doing for billions of years. And like they will be doing for an extremely ridiculous amount of time.
https://en.wikipedia.org/wiki/Timeline_of_the_far_future#Astronomical_events 