With any investment there are risks, and that's true for 3M (MMM -0.64%) as well. The diversified company is a huge target for international rivals, but investors need to consider whether 3M is overpriced based on its growth as well. Organic growth of 2.1% in the first quarter of 2013 won't keep investors satisfied for long, especially with a trailing P/E ratio over 17. In the following video, Fool contributor Travis Hoium goes over the biggest risks to watch for.