he crypto currency market is very hot today. Digital money is one of the trends of the economy 4.0. Perhaps you have heard a lot about terms: virtual currency, bitcoin, altcoin, ... If you do not know, the price of bitcoin in August/2017 has officially exceeded $ 4,400. However, according to many people, bitcoin will increase even more. And inevitably the growth of other coin. So, at this point, should invest in bitcoin or other potential coin?