Bitcoin is created through a process known as mining, just as paper money is created through printing and gold is extracted from the ground. Mining entails using computers to solve complex mathematical problems related to blocks and adding them to the public ledger when it first begins. To mine bitcoins, you only need a simple CPU (like the one in your home computer), but the difficulty level has risen exponentially, and you will now need specialised hardware, including high-end Graphics Processing Units (GPUs).