1): business model can be duplicated, competition will come
2): growth rate can not sustain
3): don't make money yet
Boy, you don;t know anything about momentum stocks. Those may be sound reasons, but they have nothing to do with the price of YELP now. This has a relatively low float and is easily influenced by 1 or 2 traders. YELP will go down when they are done.
Having said that, I did short at $32.
look at ANGI and you will know why YELP could see $50 by year end!