What is Yearn.Finance (YFI) in DeFi and how does it work? NFTs have recently made a significant impact in the world of cryptocurrencies, frequently making headlines. In 2021, the Hermitage planned to hold an exhibition featuring NFT collections. Prior to that, Twitter co-founder Jack Dorsey sold his first NFT tweet for $2.9 million, and artist Mike Winkelmann sold his NFT artwork for a record-breaking $69 million.