That Zaap is an interesting one... I have been watching that too... although not an investor yet...
One I do like and know (I know the inventor and tech for 12 years now) will do extrememly well soon is HABE. They have a process that extracts gold from ore concentrate or from E-Waste in extremely fast batches, with efficiencies in the 99% range and they do it with a formula that is so NON TOXIC you can drink it.... habercorp.com if you want to read up.
They have 500 square miles of land concession in Ghana as well that is smack dab in the middle of some of the largest gold mines in the world.... I mentioned this one a while back to a few readers here...hope they bought in as it is now almost 3x the price but still very reasonable for where it is going. I say $5 by end of next year.... check them out...read up on EMP too... only process in the world that can separate molecules in seconds.... their time has come!
Look who is running the company too... tight with stock and very responsible..all financials caught up and approved by SEC... this will be a huge winner...!