I've pointed it out thousands of times, but they are able to drive demand for physical gold and silver towards the ETFs. So instead of people jumping into buying physical gold and silver, they are choosing to get "exposure" to the metals by purchasing GLD or SLV, which is not physical metal but "paper" metal.
Now having said all of that, the spot price of silver right now is about $27-28, yet you will be hard pressed to find a Silver Eagle right now for under $40 and any other form of silver for under $34.