Along the same lines, ...

Precisely talking to U.S. Global Investors about this topic, Friedland said that within this context people are going “to need a telescope to see copper prices in 2021.”

http://www.mining.com/robert-friedland-bullish-copper/

Friedland, or course, is probably the word's best known and most successful mining investor/promoter/developer.  Also, as I learned not too long ago, he was a very early friend of Steve Jobs many years before the founding of Apple. They picked apples together in the State of Washington.