"A lot of noise is made about the growing global stockpiles....

"A lot of noise is made about the growing global stockpiles. When put in context of the rising levels of demand, these stockpiles actually start looking quite small. The current global copper stockpiles have risen to a ten month high of 517,000 tonnes, but this would still only satisfy the world for around 26 days according to Morgan Stanley's research this week.

Another factor supporting metals prices is the difficulty industry has increasing supply when the world wants it. Copper has one of the most inflexible supplies, which is why I am looking at Copper companies for Diggers and Drillers Readers. The last few years has made things even tighter. This makes for higher prices, as rising demand quickly outpaces an inflexible supply."

This is from 'The Daily Reckoning'
Shows that as fast as the pile goes up, it goes back down.
The electric car market will get very big in the not too distant future, as well as the infrastructure required in China and India with getting their electicity grids sorted out.
I'm very doubtful on most base metals, but copper will be king.