I would define this growth with two examples. Twitter as an IPO and Sony Walkman as a product.
As I can recall, something very similar happened with Twitter IPO (even if they are not the same sector companies) - too much talk about financial parameters, and relative measure. There wasn't an explicit source saying about sustainable growth and survival of the company against competition. Final story is that at initial analysis everyone is acting occupied with one or two things and not the whole environment.
Why I am mentioning Sony Walkman? That was a fantastic product. Unique on the market. Quite as GoPro is today.
Wait! Stop right there. I will just add line from Wiki about Walkman falling success - ''After losing a large portion of the market to other companies...''. To be exact, we haven't seen real GoPro's competition yet. And that's paradox with this stock. Making assumption based on relative parameters and not having exact companies to compare with is quite non-logical.