I also find cryptokitties boring, but the initial hype tell me that they have hit something. I would not be surprised if it is going to rise again. Also, there are millions of cat lovers in the world (crazy cat lady is a real phenomena: The hypothesis is that infection with toxoplasmosis from cats alter the behaviour in humans), so I would not be surprised if these ladies are going to pay a high amount of money to have their own special digital breed.