[briefcomment]

That's not really a useful comparison. Of course a cube of the world's gold wouldn't really do anything. But a cube of soil and gas stations would be pretty useless too, without some work by humans. If humans worked the gold, it would return to being used for a purpose. That purpose is "trustless" accounting, which is certainly valued by some. Instead of relying on ledgers, and paper, and accountants and bankers, gold provides you some control of the money you have saved.