gold testing 1000 again, page-8

Gold is the only commodity which is accepted world-wide as payment for goods or services.
Every sizeable town or village, anywhere in the world, has a person who can test and verify the validity of a gold coin or gold bullion.
So, a belt full of Krüger Rands or Maria Theresia Thalers will see you right no matter where on this planet you are.

What other currency or commodity can do that?

Think about it.