Too bad for them this plan doesn't work. Western investors are literally mentally retarded and metals demand drops off a cliff when the price is low while demand is huge in the rest of the world like China right now.
Westerners always jump in to FOMO buy at the top and don't buy anything at the bottom.
It has a lot to do with currency stability. People in developing nations value metals because they outperform their national currencies in the long run. It's more like a defensive medium against inflation and currency devaluation rather than an investment - although it's both. In Greece, british gold sovereign coins were pretty widespread as a form of value-storage, before the euro. Then the euro came and it was considered stable enough to almost eradicate the "habit".