Facebook's (NASDAQ: FB) Instagram service has so many opportunities ahead of it that it's hard to keep track of them all. From expanding into emerging markets to e-commerce to long-form video, the popular photo- and video-sharing service has no shortage of growth levers it can pull. In many ways, Instagram has been relatively insulated from the controversies plaguing its parent company, allowing to better focus on these initiatives without being distracted.Investors should now consider another opportunity that Instagram has: music.Image source: Getty Images.Continue reading