I don't know. Seems more and more people are joining the fray. Some of these people look back at what they missed since 2008 and raise the prices of specific pieces. A lot will never take off. It all depends on the title, really. Obvious, Akira, Bride, Thing, Phantom, Robocop, etc... have all become classics in their respective genres. They have defied time, and new fans are born every day. I don't see them ever coming down. Plateauing at some point, but not coming down.
T