Gold investors are prone to making common mistakes that can be detrimental to a portfolio, including excessive diversification, picking companies that don’t adhere to an investment objective, and not sticking with management teams with proven track records, said Rick Rule, president of Sprott U.S.“If I had just hung out with the Ross Beatys, the Bob Quartermains, the Robert Friedlands, the Lukas Lundins, all of them I’ve done business with, by the time I was 35 and not bothered with the rest of the universe, I would have worked less hard and made more money,” Rule said.