This is a sort of weird idea, probably inspired by a TV series.

Imagine that you had an idea or written something that is so controversial in nature that if read by anyone right now, would lead to misuses or missunderstandings. A hundred years or two hundred years, from now, it could be absolutely trivial.

You don't want to destroy the idea. Your vanity has won. What to do?

Build a safe with a timer. It only opens after that time, revealing the contents. 

This is meant to be software with an encryption algorithm that decrypts itself only after an elapsed time, or if the owner tries to access it.