When you buy bitcoin, you get a share of the whole of bitcoin. You buy this at the current market value. You may hope it goes up, but it may not. You buy 1 b

When you buy bitcoin, you get a share of the whole of bitcoin. You buy this at the current market value. You may hope it goes up, but it may not. You buy 1 bitcoin at market price, you have 1 bitcoin at market price. In a ponzi scheme, you buy in at a fictional price and are paid interest derived from the investments of future investors. Bitcoin purchasers don't receive anything from future investments unless they actually sell, again at market price. The word here is speculation, not ponzi. It's no different than buying/selling land that people may or may not want.