There are plenty of things about myself I don't know. It's lovely to discover more as I move through time, having new experiences.
Whether or not a new discovery in my colon, for example, has value - it might. If I have colon cancer, for example. I don't know if that's really valuable to me, or if it's just new information - it's probably valuable to the doctors and institutions - the medical infrastructure if you will - that would assign a dollar value to the treatment of it in order to extend my life further.
I daresay that knowledge of all the aliens in the entire universe traveling around the stars wouldn't bring me much solace laying in a hospital bed under those conditions.