In BTC.EE various Bitcoin and other cryptocurrency mines in Estonia are being combined with interviews with the „miners“. As cryptocurrency offers an attempt to withdraw from existing financial system, its idea about money as an agreement and the objective to release its production from the central bank's control. Every attractive idea is inevitably accompanied by the risk that new centers or „bubbles“ will arise. Small mines are replaced by increasingly bigger ones. Some options of cost-effectiveness are still open and even in Estonia there are several different types of mines, some of which are located in the territories of power stations. It is a calculation made because a vast demand of energy needed to mine virtual currencies.