Former Citigroup and Bank of America executive Sallie Krawcheck has joined the board of directors of blockchain startup Digital Asset Holdings. The New York company's board also includes Sanoke Viswanathan, chief administrative officer of JPMorgan Chase's corporate and investment banking division, and Catherine Flax, head of commodity derivatives and foreign exchange with the BNP Paribas' Americas division. "Distributed ledger technology presents a once-in-a-generation opportunity to strengthen financial services as a whole," Krawcheck said in a news release. Read the original story from American Banker.