I don't know why people say bitcoin is Ponzi. If it's ponzi, it's impossible for bitcoin to last long because usually ponzi doesn't last long, because other investors' money is deposited with other investors and so on, until they can no longer cover other investors.
and in Ponzi, most of those who profit are on top, while those who are profitable in btc are people who are good at seeing market prices and of course those who have a lot of btc.
I think the ponzi system and the btc work system are very much different. if explained here can be very long.
True, but there are still those who say that the bitcoin working system is more or less the same as ponzi, even though we as users feel the difference is very, very far. It's true what you said, it would take longer to put it here, and I think a lot of people have been talking about the difference between bitcoin and ponzi.
It does take more time to explain bitcoin to people who think of it as a ponzi scheme.