DEFICOINS LIMITED started its activity as a small group of technical specialists, employees of a large holding company that develops software. With the emerging of cryptocurrency, we concentrated on studying this phenomenon and put a lot of effort into implementing projects related to Bitcoin mining. First of all, the peculiarity of organization of our work is the geographical location of the mining farms - the cool climate of Northern Ireland allows us to optimize the financial costs associated with cooling of ASIC equipment and farms with video cards. In addition, we are working in the framework of the state program to support entrepreneurs in the field of high technology. Altogether, these factors allow us to have a low prime cost of mining and to gradually increase capacity, modernize equipment and attract high-class specialists....