Precious Metals
The idea of virtual currency backed by bullion like gold and silver has been tried numerous times. Arguably the most successful before the advent of cryptocurrencies like Bitcoin was E-Gold, co-founded by Douglas Jackson. The coin proved to be very popular at its peak in the 1990s, with at least 1,000 new accounts made each day. However, authorities cracked down on the coin and mandated Jackson to adhere to a variety of financial regulation rules and standards, turning E-Gold into a shadow of its former self.
An ideal modern-day stablecoin should be able to perform main functions. It should have the capability of acting as a medium of exchange to permit holders to buy and sell goods, function as a saving asset (without loss of value), and be used as a unit of account to compare the cost of goods and services.