If you are a Christian than you have purpose. Even if the world collapses and everyone dies in the infinitude and torturing heat of space. We Christians can be grateful that we have hope in heaven. Our future is heaven, so whatever pain or heart-ache we experience here on earth will be all the more worth it when we get to heaven.
If you are not a Christian, then I can promise you nothing better than Hell (Romans 6:23). Please except Christ as your savior today if you haven’t. You’re going to last forever, but where you last will depend on your faith, or lack thereof. Have purpose in serving Jesus, and reap the benefits from now until eternity. Enjoy!