New York (AFP) – US authorities have charged a former manager at a digital exchange platform with fraud and money laundering, in what they said was the first insider trading case involving non-fungible tokens, or NFTs. Nathaniel Chastain was working as a product manager at New York-based OpenSea last year when he secretly bought dozens of NFTs that were about to be featured on the platform’s home page, federal prosecutors said in a statement Wednesday. Chastain, 31, went on to sell the NFTs for two to five times the initial price after they got star billing at the OpenSea website, the criminal…