Cryptocurrency is a currency only by a name.
Those notes were made of paper. Bitcoin is made of digits. But essentials are the same. Both are a gambling tool for building a financial pyramid (making profit of the money brought by new participants). I wouldn't be surprised if we’ll learn that the Bitcoin was created by Sergei Mavrodi himself (he was a mathematician: https://en.wikipedia.org/wiki/Sergei_Mavrodi).