Twitter is rolling out a way to connect your crypto wallet to your account and pick any NFT image in the JPEG or PNG format there as your profile picture. The NFT avatars will appear in a hexagonal shape instead of a circle, and for now can only be set via the Twitter for iOS app.
https://www.notebookcheck.net/Verified-Twitter-NFT-profile-pictures-launch-in-hexagonal-shape-NFT-avatars-can-be-set-in-the-iOS-app-only.594622.0.html