It is not difficult if I did not say that it was easy. In fact, bitcoin is banned from trading in my country. But the law always has holes, and we take advantage of it. They do not allow us to "trade", so we use it for "exchange". It is difficult to express it in English. We can understand simply, it is the difference between buying - selling and giving - receiving. In particular, I do not need to pay any income tax from the cryptocurrency. That is a wonderful thing!