After dropping 50% last year, Amazon's (NASDAQ: AMZN) stock is finally gaining momentum. It's up 59% this year, and investors are excited about what's to come. There's plenty to expect from all of Amazon's businesses. What will it look like in another five years? Let's take a look.

Amazon has about 40% of the U.S. e-commerce market, with the closest competitor at 6%. That's a moat that would be very difficult to challenge the way things stand today. But Amazon is padding the moat to maintain it long-term.

There are two major ways Amazon's model makes it nearly impossible for any rival to catch up. The first is Prime. For a $139 annual fee, members get almost everything they need delivered free to their doorsteps within a day or two. Customers can't find that anywhere else, so their spending money goes to Amazon with overwhelming frequency.

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Source Fool.com