Brett Arends at the Wall Street Journal had an op-ed on Friday called “Why Cash Is King Again” that makes one nice small point but misses a larger one. His premise is this: “Following the data breaches of credit- and debit-card information at major retailers, some shoppers say they are putting aside their cards and going back to spending cash—like in olden times.” That trend more or less corroborates the popularity of cryptocurrencies such as Bitcoin, which function in theory much like the paper and metal cash Arends posits is making something of a comeback. The Bitcoin Analogue Just read …