Even with Dropbox being evaluated at 8 billion, less than their 10 billion dollar evaluation in 2014, you should still short their stock. There are plenty of other cloud storage companies out there that are even integrated into platforms users use on a daily basis (google). In my mind the only way for Dropbox to succeed is if they create their own platform that attracts viewers on top of their cloud storage system, similar to how google is now. Dropbox currently is not profitable at the moment and i think will become less popular as google continues to grow.