By the Constitution, precious metal is monie. By definition, fiat currencie is not monie, because the debt instrument is backed by a bond with no sound backing, which makes it an IOU. This means that "a storage of wealth" it is not. Fiat currency is not money.
The above ground supply of silver bullion is equal to the above ground supply of gold bullion. The gold and silver bullion would fit nicely into four Olympic sized swimming pools. Platinum is an even smaller market.
One percent of Americans own physical precious metal. The world population has a percentage far less than that. The realization that precious metal is the definition of money should raise this group, and that will increase the demand significantly.
As of now, most of that above ground supply sits in Central Bank vaults. The banks rely on it as collateral to make loans. They have other instruments, but nothing works better to make a loan than gold. The other instruments are MBS, bonds, and the like. These are mere IOUs in the face of physical assets, like precious metal.
Gold and silver are in every piece of technology there is. Cars, computers, phones, medical equipment, etc. Therefore investing in precious metal is a direct investment in technology.
The supply of precious metal is low, and slowing. Gold production peaked in 2001. Platinum peaked last year, and with silver demand increasing significantly, it will not be long before the sister metals Trinity are all on the backside of production. Oil production peaked last year, and the price pf oil and precious metal has a direct correlation, because oil is the lifeblood of the economy, and this real asset only trades in unison with the price of money.