I think it would be interesting to send an objectively good novel which no one has ever read to 5 different random email addresses. Set it to be delivered 2 years in the future, a paragraph per message. Would the receiving users recognize the greatness? Or would it be one of the great lost items of our world when it’s treated as spam?
Alternatively interesting would be to bury it in a time capsule and never reveal the locations. How long would it remain undiscovered? What kind of impact would it have when it was?
This is the sort of thing that keeps me up at night.