Visa/Master Card actually are the owners and rulers of the whole world. Be ware of some that now charge interest from day of purchase, and those that have a poison pill if a payment is "lost". Join a credit union for the somewhat better service if you can and get their card.
Wife and I have one card for emergencies; which are things like major car problems, dentist, and perhaps eyeglasses. With our health problems, work injury 2 years ago, and some odd things we could not fund we are carrying a balance. The card never was for things like Disney, but once upon a time it bought (with wife's full consent) a Ruger #1 (only rifle I will ever need!!!) Nothing said about want.
If you ever fly, rent, or anything a card of some sort is almost mandatory. Debit cards work somewhat the same for some of this. (See my first sentence)