There are lots of reasons to love Apple (AAPL -1.12%), but why should you sell? In this video, Fool analyst Austin Smith gives three reasons to consider selling Apple. First, Apple is so big and has grown so fast, that future growth rates will likely not match its past. Second, Tim Cook is a great guy, but does he have the vision that Steve Jobs had? So far, Apple hasn't rolled out a truly revolutionary product, just variations of old stuff. Will Cook lead Apple into innovative products and devices, or just coast on Jobs' products? Lastly, Apple iPhones have largely saturated the Western markets, meaning future growth will have to come from emerging markets. Problem is, the iPhone is too expensive for many emerging markets. So Apple could roll out a cheaper iPhone but this would likely mean lower profit margins. Lower profit margins mean lower earnings growth.