You'll increase your chances of having a safe and enjoyable trip if you take a variety of travel money with you, regardless of whether you're traveling to domestic or foreign destinations. Never rely on any one form of monetary exchange, like a credit card, to get you through a trip. This is particularly true when traveling abroad.
Variety is the key.
Traveling with this mix gives you plenty of options, plus you'll have immediate backup if any of your options are lost or stolen. Pack Wisely Never, repeat, never pack your credit cards, cash, traveler's checks or other valuables in a piece of luggage, particularly if that bag isn't going to be with you at all times. You may be surprised to learn that some people invariably pack valuables in their checked luggage, then find themselves in a prickly predicament if their luggage is delayed or lost by an airline or cruise line. Don't leave your valuables in your hotel room, rental car or luggage. In fact, each time you exchange money, you'll need your passport for identification.