Moreover, in December last year, Bitmain changed its sales strategy, taking on some of the risks of miners: now the equipment can be bought by installments or leased. Also, large customers can buy put options - contracts for the sale of military-technical cooperation on March 27, 2020 at $ 5000. Customers will be able to sell the coin at the agreed price if its value drops below, making mining unprofitable. This should reduce the fears of investors and miners about the volatility of bitcoin.