As much as I enjoy using cash, it isn't the best method. You have to carry it. You have to carry the change. The store had to have enough change. The store had to keep the pile of cash, and keep it safe. Then transfer it to my the bank at the end of the day or week or whatever. If you run out of cash on you, you have to figure out how to get more Cash had some nice features, like it is fairly anonymous. But it is far from perfect.