There is no purpose to us other than the purpose we choose for ourselves. Beyond that there’s nothing - just matter and energy interacting according to the whims of quantum mechanics. If a freak asteroid hadn’t wiped out the dinosaurs 60 million years ago then we would never of existed. Likewise one day the human race too will be gone. Eventually the tiny speck of dust we call planet earth will be consumed by our own unremarkable sun when it expands and dies. Maybe life will evolve somewhere else - maybe it won’t. Maybe something else beyond our imagination will arise from the random fluctuations of energy and matter in the universe. In the end though everything we’ve ever said or done will be rendered completely meaningless by the relentless onslaught of entropy as the universe continues it’s slow march towards inevitable heat death. [spoiler]Have a nice day. [/spoiler]