Well, the more money the Weimar Republic printed, the more useless it became. The more useless it became, the more they thought that they had just not printed enough money. It finally got to the point that people started finding all types of creative things to do with the currency. This guy is wallpapering his house with it. So, I guess you can never say a currency is useless, as you can always use it to decorate your house.
