Their is some value to gold, just not the magical value some people attribute to it.
The value of these particular coins is not the gold, it is that there are very few of this year/type of coin in existance. It is the value to collectors not the value of the gold.
BTW. Other than the value that people "attribute" to an item, what value does it really have?
Rare gold coins? The Mona Lisa? Season tickets for the Red Sox?
If people don't attribute value to items, they have no value at all.