[ad_1] <br><img src="https://www.coindesk.com/resizer/yaLV3lVsCGhVTXIGMZ-4AiAAILo=/800x600/cloudfront-us-east-1.images.arcpublishing.com/coindesk/P7MTHAZPVBAARE2KT3XC5AGSE4.jpg" /><br>Cryptocurrency exchange Kraken has officially launched its NFT marketplace from beta testing, supporting over 250 NFTs across the Ethereum, Solana and Polygon blockchains.