3 Next Big Thing stocks that turned out to be nothing By: MarketWatch April 29, 2014 at 06:00 AM EDT Marijuana, fuel cells and 3D printers are all hype and no substance, writes Jeff Reeves. Read More >> Related Stocks: 3D Systems Corp Apple Ballard Power Sys Plug Power Inc Stratasys Ltd Tesla, Inc. Voxeljet Ag ADR