That's like saying "Jews stole all the money so nobody on earth can ever use money again".  A lot of those metals went east to places like China, but there's also a lot in vaults/caves in places like Switzerland in the name of Jewish moneychangers.  When the rest of the world forces everyone back to metals and off the dollar, the west will get desperate to get metals to back the currency and do what Saudi Arabia did - lock up the Jewish Oligarchs and torture them until they give up the money they stole.  

Also, JPMorgan already cornered the market and owns 1/3rd of the physical silver on the entire planet and claims it's for a "client" order.  Some people claim the "client" is China due to vault ownership records, but I doubt the US govt would just allow China to artificially manipulate silver to zero while cornering all the metal on the planet and stealing it all for no reason.  The client is likely the US govt and that's their metals insurance plan, to back the dollar with silver instead of gold because they have no gold.  The law says $1 is equal to 371 grains of silver anyway, and the punishment for debasing the currency is death under the coinage act of 1812.