When the first entrepreneur discovered salt, oil or gold for instance, they likely had no idea of the intrinsic-value, utility-value or exchange-values of them. In most all of these cases, the lucky dudes named Sitoshi brought some of their new "intrinsic curiosity" back to the encampment, and noticed their pals also had a curiosity about it, so he promptly gave them some in exchange for a few extra cups of their grog and went back a day or two later to the place he found that for more, to continue his enterprise. He did this because he was made drunkenly aware that this new "common curiosity" of his seemed to have both an intrinsic(curiosity) and what remarkably seemed to be an exchange value!