Lack of any real goods. Gold futures, as with all securities, have zero liquidity outside the markets where trade takes place.
I prefer buy physical gold but not gold bars. I use gbullion.com and can buy 0,0001 grams of gold.
I consider, that it is a right time to invest money in gold stoks. My opinion is divided also by the author of this blog ( http://goldvender.com/ )devoted to investment in gold.