** Shares of cryptocurrency and blockchain-related companies down premarket, hurt by weakness in bitcoin
** Bitcoin BTC=, world's biggest cryptocurrency, falls ~3%, while Ether ETH= drops ~2.3%
** Optimism on digital currency after Trump's proposal for a national strategic reserve of cryptocurrencies continues to wane down as market participants awaits more details about the crypto initiative
** Crypto exchange Coinbase Global COIN.O down ~5.6%, U.S.-listed shares of blockchain farm operator Bitfarms Ltd BITF.O down ~2.8%
** Crypto miners Riot Platforms Inc RIOT.O, Hut 8 Mining HUT.O and Marathon Digital MARA.O down between ~3.5% and ~8.4%