Everything depends on many factors – current situation on the cryptocurrency market, the development of cryptocurrency value against classic physical form of money (so called FIAT), cryptocurrency dividing, new cryptocurrencies on the market, new mining machinery on the market (leading to more difficult mining and and to lowering the profit on old machinery), general interest in cryptocurrency from investors and specultants point of view and many more. All these factors, if known beforehand, we try to evaluate when calculating the potential return on investment.