When it comes to precious commodities, it could be copper, not gold or oil, that stands out in the future, according to Dr Les Coleman.
"Copper is interesting. It has been mined for the better part of ten thousand years, so we know copper very, very well, but the price keeps on going up."
"Generally if you know something very well you should be able to produce a lot of it quite cheaply and we don't seem to be able to do that, so it may be (a commodity) to look out for."
According to Dr Coleman we may be seeing the approach of 'peak copper.'