I don't think any of them are ponzi schemes. Shitty investment based on speculation and hype != illegal or ponzi scheme
Bubbly sectors see irrational amounts of money thrown at things that have little underlying value, like Beanie Babies, or a token for a proposed protocol described by a two page whitepaper.
Bubbly sectors see irrational amounts of money thrown at things that have little underlying value, like Beanie Babies, or a token for a proposed protocol described by a two page whitepaper.