In this segment of the Motley Fool's "Ask a Fool" video series, analyst Blake Bos takes a question from a Motley Fool reader, who asks, "Is 3D Systems (DDD -3.43%) a value investing choice?" While 3D Systems is one of the cheaper plays in the 3-D printing space, Blake cautions investors that the value investing approach may not be a good fit with the high valuations and wild volatility in the 3-D printing industry today. Blake then gives one strategy that investors who are interested in 3-D printing stocks can use to get into a position while still mitigating risk.