Yes, there is risk in everything, especially in a speculative asset such as money. We don't need someone telling us about total supply to know that the total supply is limited by God and not by social convention. Subjective valuation leading to exchange on the margins brings prices. You don't have to accept an "official" price, either. The actual physical exchange prices of gold frequently deviate from the Chicago and London prices. The subjectivist marginal revolution in economics did not come until 1871, yet gold was money for thousands of years prior to that understanding. Or if you prefer Smith's 1776 work, still, gold was money for thousands of years prior to that. It didn't require the understanding of the participants in order to work.