Gold does not rot. Neither does silver, or any other precious metal or gem. They are, moreover, useless, their aesthetic value not entering into the equation. One can heap up as much of them as one wishes, or take them in trade for food. By the tacit consent of mankind, they become a form of money (one accepts gold in exchange for apples with the understanding that someone else will accept that gold in exchange for wheat). One can therefore avoid the spoilage limitation by selling all that one has amassed before it rots; the limits on acquisition thus disappear.