"Ponzi" is not a word, it's a name. I will also say yet again, since you don't seem to understand, that my point is that the terms are being used colloquially to denote a monetary scam. Arguing that bitcoin property X does not meet a textbook definition of a specific type of monetary scam does nothing to argue against it being a monetary scam. Calling it an investment does nothing to argue against it being a monetary scam. Madoff provided "investments" too. A decentralized scam does not make it not a scam.
This argument over whether or not the terms are being used correctly is the textbook definition of a red herring.