** Shares of cryptocurrency and blockchain-related companies fall premarket
** Bitcoin extend losses after its steepest monthly decline since the 2021 crypto crash, as renewed risk aversion drove investors out of stocks and digital assets
** Bitcoin BTC= falls 4.9% to $86,917.71, after shedding more than 20% in November; ether ETH= down 6.2% to $2,833.31
** Ether ETH= falls 6% to $2,840.29
** Crypto exchange Coinbase Global COIN.O falls 3.5%, while blockchain farm operator Bitfarms BITF.O drops 6.3%
** Crypto miners Riot Platforms RIOT.O down 4%, MARA Holdings MARA.O falls 4.1%, Hut 8 HUT.O slides 4.4% and Bit Digital BTBT.O drops 3.8%
** BTC buyer Strategy MSTR.O declines 3.9% while mining machine maker Canaan CAN.O down 4%
** Ether linked BTCS BTCS.O falls 6.9%, Bitmine Immersion Technologies BMNR.A down 6.4% and Sharplink Gaming SBET.O down 5.9%
** ProShares Bitcoin Strategy ETF BITO.P and iShares Bitcoin Trust ETF IBIT.O fall 4.6% each, while ishares Ethereum Trust ETF ETHA.O falls 6.5%
** Up to last close, BTC had risen 7.5% YTD, while ETH down 15.1%
(Reporting by Avinash P in Bengaluru)
((Avinash.P@thomsonreuters.com;))