So either you dont know what a ponzi scheme is or don't understand bitcoin at all. This article seems ot indicate the latter. You get to the ponzi scheme idea by conflating all of crypto, including bad actors in it, with bitcoin itselt. You see you think that becuase there are scams that involve bitcoin then bitcoin itself is a scam. Worse, since you only seem to know of one type of scam, you call it a ponzi scheme.