I'm convinced the death of Snapchat will be its failure to expand to new international markets like South America. Insta, FaceBook, WhatsApp, etc (all FB owned) have exploded and maintained themselves overseas. Meanwhile, a year ago reports came up that Evan Spiegel of Snapchat said that his app is not for poor countries like India.
That hubris is dangerous. I can't wait for the company to go under.