Once I was paying for my groceries in Germany using my American credit card. There was an old man behind me who was a bit impatient. While the payment was proce

Once I was paying for my groceries in Germany using my American credit card. There was an old man behind me who was a bit impatient. While the payment was processing, I said to him I was sorry about the delay and he asked me why I was not using cash. I told him that I wasn't carrying any. He said "cash is king." I thought it was funny but he was very serious about it.