I think it almost became similar to the Beanie Baby hype. People would buy and collect thinking that the unique/rarity would lead to these being collectables. I think the hype for CryptoKitties is now over.

You may want to hold onto it because this is the first big dapp for the masses. In a couple years as Ethereum matures there could be articles on CryptoKitties and people may want to come back and own some as novelties.