The world is changing before our eyes! Once upon a time people did not know that the earth was round. They lit stoves to keep warm, without any comforts. People rode horses and dreamed of flying like birds in the sky. Goods were exchanged for goods, for gold or silver. Now people live in comfortable houses and apartments, travel by car and plane to anywhere in the world, communicate with the other side of the earth as if a person is nearby. And we hardly even use paper money anymore, but pay by non-cash payments and transfers. A new era is coming - digital money. The era of cryptocurrency.