I worked as a draftsman for the Department of Environmental Protection, and as a teacher, in N.Y.C.; at a big bank and a small ad agency, a tiny law firm and a few giant ones; as a cashier and a dishwasher; preparing deli sandwiches and stringing tennis racquets and pruning evergreens into conical Christmas-tree shapes.

With the education I had, all I could do was work as a burro, in whatever I could find: shoeshine boy, janitor, dishwasher, waiter, bartender, cashier, bricklayer, painter.

Instead of the cashier and ticket-ripper of the movie theater, the block chain consists of thousands of computers that can process digital tickets, money, and many other fiduciary objects in digital form. Think of thousands of robots wearing green eye shades, all checking each other's accounting.

My very first job was a cashier at Burger King in Tucson Arizona. And I occasionally worked the drive-thru. I'd go wherever I was needed! My second job was at Dairy Queen. I stayed in the fast food royalty.