Nov. 27 (Bloomberg) -- U.S. stocks opened higher on cryptocurrency concepts as bitcoin rose, with Coinbase (COIN.O) up 4.83%, Bitfarms up 5.58%, MicroStrategy (MSTR.O) up 9.82%, Riot Blockchain (RIOT.O) up 5.37%, and U.S.- listed Hut 8 Mining up 4.83 per cent and MARA Holdings up 7.45 per cent.