I can't entirely agree that it will last longer then any of us, because many huge innovations have dissappeared or changed in the past. However, I think bitcoin has opened a doorway which will lead to all finances in the future to be completely electronic and instant. We may find in say 20 years that there is hardly any cash used for daily purchases.
Exactly, bitcoin is internet cash from the beginning. It is advanced cash since cash had never been so efficient before.
Bitcoin can circle much faster than cash, it costs little to move once....it will totally change the game.