Bartering still exists, but it's mostly a thing of the Past... I like having a Physical Tool to measure Value, but I can't see anything stopping the activation of a U.S. Crypto-Currency... I'm sure it will play an important part in the Removal of all Federal Reserve Notes... I like Silver a lot, and it is a Store of Value, but I can't see it ever being used again as an every day Circulating Tool, to Measure Value...