No. Minecraft just exploded on gaming news lately because of the Harry Potter server that went online. That, and the fact that LPers on Youtube are still playing it to death after Pewdiepie made a killing replaying it not too long ago.
I think Minecraft will end up like World of Warcraft in the sense it will always be profitable, no matter the periodic drops, and new releases of content will always bring the playerbase back for a while.