GoPro (NASDAQ: GPRO) has been on a rollercoaster ride over the past two years. After soaring from its IPO price of $24 to almost $87 in Oct. 2014, the stock crashed to under $9 earlier this year before rebounding to the mid-teens. That initial optimism was fueled by robust sales of its Hero 4 cameras, while the subsequent pessimism was caused by weaker sales of its mid-range cameras and the failure of the Hero 4 Session last year.