I too have spent time in investment banking, but I don't consider Ms Erica to be a crazy conspiracy theorist. Note that she talks about silver and palladium, both of which are both industrial metals as well as precious metals. I wouldn't advise gold, but when you look at the underlying economics for silver and palladium, I think there is indeed a good case. They have strong, fundamental sources of demand. Why do Goldman Sachs (and others) hold so much uranium and other commodities? Demand, supply and market cycles. Buy when the price is low (like now). Watch the supply dwindle because of the lower price. And then take your profits when the price skyrockets due to the resulting demand/supply imbalance.
Maybe the Dow will hit 20,000 in a year. Quite possible. But I also bet it will drop significantly as well at some point. And with the way the current market is artificially manipulated, absolutely another bubble. Remember that the financial engineers of the market make their money in both directions, and they need the market to be going down just as much as it going up. And unlike the value of tulip bulbs, the market will go back up... eventually.