Other Rugpull/Ponzi Cryptocurrencies?

With the collapse of Luna and Safemoon which seem to have, in some way, been designed as ponzi/rugpulls. What are some other relatively popular cryptocurrencies that you believe full into this category (and why)?

It seems that many in the crypto community were unaware of Luna’s potential to fail. A recent video by CoffeeZilla explained it all succinctly should anyone be interested, but I had been seeing people in the crypto space gunning for Luna. Doesn’t a 20% return seem too good to be true though?