There's no such thing as too much protection for an expensive, breakable and sensitive item such as a camera. You may already have a camera bag to carry your camera and accessories around in, but you can protect it even more with a camera case. There are soft cases, semi-hard cases and hard cases. Some cases will fit over a camera and still allow you to take photographs with the case on. This is typical of underwater camera cases. Other cases are more or less carrying and storage items and others still are hard protective cases.
Make sure your case fits the camera properly and offers it some protection. It shouldn't be too heavy or bulky, but it should be durable and waterproof. If it is a carrying case, it should have handles, or a neck or shoulder strap. It should also have compartments for your lenses and accessories.
Camera cases come in assorted styles, colors, materials, shapes and sizes. They range in price from about $10 to several hundred.