Should a person own a credit card?

A credit card is very useful nowadays for doing things like buying things on the internet, something more and more people do. So if a person knows how to properly look after their money and can keep control of a credit card, then they should make use of it. They should not need more than one credit card. If someone thinks it is a simple way of getting lots of money, then they don't really understand how to use one and they should not have one.