Yeah I wonder about this too.

This time last year (or was it the year before that?) it was Snapchat (remember Snapchat? Kids don't) that was going to take over the world and be bigger than Apple + Facebook + Google combined etc etc. I don't think that worked out really.

I am guessing that investors just pile in wherever the "youth" are without paying too much attention to what it really is they are investing in... just hoping to get in early on the next big thing I suppose