FTX, the cryptocurrency exchange backed by investors including Sequoia, BlackRock, and Temasek, is calling on regulators to come up with a single rule book to oversee virtual assets . Splitting oversight across multiple watchdogs based on whether a product is a “security” or not will not protect investors, the unicorn’s chief executive warned. Sam Bankman-Fried, who co-founded the three-year old exchange in Hong Kong but moved to the Bahamas last year, said regulators should instead focus on building a single framework that mandates full disclosure in the global cryptocurrency market, now valued at US$2 trillion. This would enable investors to…