Just don't be like one Delta CA I flew with a while back. He carried a Crowne Royal bag of silver dollars with him. He made a big production out of it, announcing "Now that's not 50 cents, thats TWO DOLLARS. Don't go throwing that in the hotel vending machine. Those are special!" Novel idea? Maybe. But his presentation made him look like a d-bag. It got really old by day 4. He was a nice guy otherwise.