I do not think that bitcoin and other crypto currency is a financial pyramid. Absolutely different mechanisms work here. However, it can not be denied that there are certain similarities. Now in bitcoin, really a lot of people have earned money and become rich. However, what will happen if all bitcoin holders try to sell their bitcoins? They will not be able to sell it at a good price and very many will suffer losses. Why? Just because the first people have already enriched themselves in bitcoin. Bitcoin does not create any material value for us. Why then did people become rich using the difference in his course?