Crypto stocks rise as bitcoin gains ground

** Shares of crypto- and blockchain-related stocks up in premarket trading** Bitcoin , the world's biggest cryptocurrency, rises 3%, while Ether up 2.6%** Crypto exchange Coinbase Global rises 4.7%, U.S.-listed shares of blockchain farm operator Bitfarms up more than 7%** Crypto miners Riot Platforms , Hut 8 Mining and Marathon Digital rise between 2% and 5.5%** Bitcoin miner CleanSpark up 2.6%, while software firm and major crypto bull MicroStrategy jumps 5%** Shares of retail trading platform Robinhood , which also tend to track moves in bitcoin, rose nearly 4%