NFTs existed before 2021, but this year they went mainstream, as overall trading volume surged, hitting $10.67 billion in the third quarter of the year. New trends such as generative artwork and collective world-building have emerged, while big brands like Adidas and Visa are also in the market. We've rounded up the year's biggest NFT influencers on Twitter, taking into account their impact, the size of their following, and the diversity of their voices.