People have a long and intimate history with coins. Some of us collected them as kids, and we all touch and see them every day. Unlike currency bills, we know intuitively that a coin's value is supposed to come from its metal content. That's why quarters are bigger than dimes. As a result, most people have viscerally rejected the platinum coin idea. To assign an arbitrary, sky high, valuation to a small piece of metal strikes most people as a deceitful, desperate act. They are right.