Twitter will now allow non-fungible tokens (NFTs) as a profile picture, & has even found a way to verify such accounts. For now, this feature is available for subscribers of Twitter Blue on iOS only.
It says here:
We’re adding NFTs as one of several ways to customize your Twitter profile so you can show off the NFTs you own in a hex-shaped profile picture on your Twitter account. Setting up an NFT profile picture means people can associate your Twitter account with your connected wallet’s public crypto wallet address. This means your Twitter account will be associated with your current and historical crypto wallet transactions and holdings, including all other NFTs in that wallet, because this information is all available on the public blockchain.