Background: Bitcoins are created by solving highly complex computational tasks, and the computing power provided by them. This requires special computers with expensive, extremely fast processors, which have been specially installed for this purpose. To incentivize these acquisition costs, to mine bitcoins and thus to operate the network, the procedure Proof of Work (POW), better known as Mining, was established. With additional Bitcoins the network rewards the miners for their efforts. In this way not only the hardware costs, but also the costs for the enormous energy consumption are amortized. A method that pays off for the miners. Due to