* Axie Infinity. That's a Ponzi in the collapse phase. Their Smooth Love Potion token is down 90% and in a screaming dive, and their Axie token is down 37% from peak. That one is going to hurt a lot of poor people in the Philippines. Many quit their jobs to play Axie's play-to-earn game. All the money comes from later entrants, so it's a Ponzi by definition.
* OpenSea. The NFT market is in worse shape than it looks. People are minting crap art like crazy, and people are buying it at inflated prices, hoping to flip it to a greater fool. If you look at actual resales on OpenSea, they're not happening much. The supply of greater fools is running out. As I've pointed out before, this works just like Beanie Babies on eBay. Asking prices around US$5000, actual sales around $50, most items show zero bids. NFT markets don't visibly crash, they just quietly stall. Most NFT markets don't show statistics which expose that.