I read somewhere today (sorry don't have a link at the moment), the Status ICO was using the Ethereum blockchain and the popularity of Status was causing major delay and fees on Ethereum. Looks like growing pains on the horizon. Lets not forget that Bitcoin has survived some massive user expansion and proven itself robust. There are a lot of new cryptos out there that have yet to be battle tested. It is going to be an interesting year to watch it all go down.