Think of the last time you filled up your vehicle’s gas tank. As you were pulling into the service station, you likely noticed that the price if you paid by cash was a few cents less per gallon than the price were you to pay by credit. Though many service stations have enacted this policy to maintain profit margins (it’s estimated that credit card transactions cost about 3 percent more than cash-only transactions), this is an example of why cash is still relevant in today’s world. In fact, it’s estimated that 40 percent of all transactions in the U.S. are made using cash. Conversely, less than 20 percent of transactions are made with credit cards.