Cryptocurrency is very high, but recently we have entered our lives? not vinyatki, namely, to be more interested in cryptocurrency. What is the logical nutrition: how can you replace them with traditional football groschen (or navpaki)? On special sites https://merehead.com/blog/challenges-of-cryptocurrency-exchange-development/ they are easily dosed and simply enter crypto exchange. Such online resources are called crypto exchange. There are real and physical "offices of companies that are engaged in buying and selling in the field of digital currency.