The peculiarity of cryptocurrency is that it has a very high price volatility. Moreover, the market may fall much more than what happened in mid-March of this year due to the emergence of coronavirus. In the first half of 2018, the price of bitcoin fell to $ 6,000, compared to $ 20,000 in December 2017. Therefore, we must use this feature of the cryptocurrency market and buy bitcoin and other cryptocurrencies during periods of their price fall, and then sell during periods of their peak price. Those who bought bitcoin in the second half of March will have a good profit by the end of the year.