Betting on a powerful secular trend, like streaming entertainment, can be a solid investment strategy. In particular, (NASDAQ: ROKU) is a business that appears to be in a good position to benefit from consumers cutting the cord, as well as advertising dollars moving over to connected TV. 

Investors who want to bet on the growth of the streaming industry might be leaning toward adding Roku shares to their portfolios. But it's of the utmost importance to also be aware of any downside possibilities. 

With that being said, let's look at what could be Roku's single biggest risk. Here's what investors should know. 

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Source Fool.com