“With all the buzz about Bitcoin, PayPal (EBAY), Google Wallet (GOOG), and all the other innovations in digital currencies, it’s easy to forget that cash remains remarkably resilient. In part, that’s because the cost of using it is often hidden to the users themselves. Chakravorti, along with co-author Benjamin Mazzotta, says that’s especially true for those who don’t even have a bank account. The unbanked are four times more likely to pay fees to get their own money, yet are also more likely to trust cash and feel comfortable carrying around large amounts.”
http://www.businessweek.com/articles/2013-09-10/why-cash-costs-the-u-dot-s-dot-economy-real-money
