Let me tell you why you're wrong. The whole point of Ponzi scheme is to gain something out of nothing, in case of BTC and other cryptos who gains? Nobody. BTC is decentralized, it regulates itself by demand and that's where the price comes from, for Ponzi pyramid someone has to stand for it and regulate everything and drive up the price. And the last, but not least, you say BTC has nothing behind its price, but what about the energy consumption while mining, and the more there are Bitcoins - the harder it is to mine them, so they can't be so easily "printed", which may have led to a crash. Satoshi Nakamoto is a genius, not a liar, he gave people the opportunity to be more independent for what we should be thankful.