You're aware that a Ponzi has a very specific definition, more specific than "scam," correct? Neither Bitcoin nor Ethereum have a central operator generating r

You're aware that a Ponzi has a very specific definition, more specific than "scam," correct? Neither Bitcoin nor Ethereum have a central operator generating returns for older investors by disproportionately funneling revenue paid by new investors to them. When the price rises, new and old investors profit equally. You could use BTC as a currency in a Ponzi, Bitcoin being a Ponzi would be impossible by definition.