Original article on "What is Money?", a topic I find to be quite at the base of all things regarding "cryptocurrencies" or perhaps what is better referred to as "digital money".
It's an article about a brief 30 year period where seashell beads known locally as "wampum" were the prevailing commodity of Colonial America. Both prior to, and afterwards, silver-based money was the standard. So it makes for a recent study into the value of money, and perhaps what gave wampum