Paying your pals with digital options from Venmo to Facebook

Cash is passe, say digital mavens. If you really want to pay your friends back for that pizza party, use an app to shoot money to their mobile-phone number – or their Facebook account.
Such technology-enabled peer-to-peer payments are growing quickly. Forrester Research predicts mobile peer-to-peer payments will hit $17 billion by 2019, growing an average of 26 percent annually. That compares with expectations of total U.S. mobile payments of $142 billion by that year.
PayPal and its Venmo