The CryptoPunks are 10,000 uniquely generated characters. No two are exactly alike, and each one of them can be officially owned by a single person on the Ethereum blockchain.
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Originally, they could be claimed for free by anybody with an Ethereum wallet, but all 10,000 were quickly claimed. Now they must be purchased from someone via the marketplace that's also embedded in the blockchain.
CryptoPunks were released for free back in 2017 and few days ago CryptoPunks Ethereum NFT sells for almost $ 24 million ... true or not, they exist and they work.
You can buy one from here.
This is one image with a CryptoPunks character:
