I don't know, people probably have.
A lot of these exchanges are pretty much ponzi schemes, but this idea that crypto is a ponzi because people buy it and hope the price goes up is wrong in my opinion because it applies to nearly everything.
People buy apple stock because they want the price to go up and sell to a new guy. The value of apple stock, is not tied to the earnings, it is largely tied to speculation. TSLA is a great example.
1929 and 2008 happened with no crypto, fix the money fix the world.