You’d think the ubiquity of credit cards, the rise of payment solutions like Square, and the surge of online transactions would all be swiping away the amount of cash in our increasingly cashless society. But “on June 26, the amount of U.S. currency in circulation reached an all-time high of $1.19 trillion.” While most of us pay with plastic, concerns about the global economy and the state of the banking industry has turned a lot of people into collectors of cold, hard cash.