Tourism is expensive. In addition, why should cities and countries work so hard to host events such as the Super Bowl, the Final Four, the Olympics and the World Cup? Although these activities are costly in terms of infrastructure, planning and security, they also contribute to the local economy as a result of increased business in local hotels, restaurants and shops. Therefore, whether we are aware of this or not, most of our travel expenses are generated by trading with merchants at the destination. Whether you are booking a hotel and day trip before departure, or simply shopping and dining after you arrive, this is all right. So you might ask yourself what is the best way to pay for all these merchants? Is it cash? Is it a traveler's check? Is it a credit card?