Dana Blankenhorn for SeekingAlpha:  While many people consider 3D printing dead, given what has happened to the stocks of industry leaders such as 3D Systems, Stratasys, ExOne and voxeljet , it's more accurate to say the industry has rebooted and is preparing for another run.

This means the industry's excitement is now coming from college campuses and startups. As an investor you want to keep an eye on this, but withhold your investment.

Industry leader 3D Systems has been drawing a bid this year as it  undergoes a restructuring, bringing in more professional management, anddropping the Cube, its consumer printer, from the product line. For all of 2015 it reported a loss of $664 million, $5.85/share, on revenues of $666 million. The stock, which once traded as high as $96/share during the last boom, is now at around $13, but it had been as low as $6.42 in mid-January. Founder Charles Hull, 76, has been kicked upstairs to a Chief Technology Officer role.  Cont'd...