The Two Worlds of Precious Metals: East and West - (Nielson), page-30

So as to make sure that you cannot store your wealth outside of the electronic banking system.
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Lots of things are outside the banking system, I've got some cows here that are. I can sell them, or eat them.

For cash if I wanted to. I don't, but I could if I wanted. They're useful, gold's no use to me at all, if I thought it was I'd own some.