** Shares of cryptocurrency and blockchain-related companies fall premarket after bitcoin falls below the key $70,000 level
** Selling pressure intensified after President Donald Trump's nomination of Kevin Warsh as the next Fed Chair, which analysts say could mean a smaller Fed balance sheet, a negative for speculative assets
** Bitcoin BTC=, the world’s biggest cryptocurrency, down 4.3% at about $69456.06, its weakest level since November 2024
** Bitcoin has already fallen nearly 8% for the week, taking its losses for the year so far to nearly 20%
** Crypto exchange Coinbase Global COIN.O falls 5%, while blockchain farm operator Bitfarms Ltd BITF.O down 6.3%
** Crypto miners Bit Digital BTBT.O down 3.3%, Hut 8 HUT.O loses 5.1%
** Mara Holdings MARA.O declines 5.2%, Riot Platforms Inc RIOT.O down 5.9%
** BTC buyer Strategy MSTR.O falls 7%; co set to report quarterly results later in the day
** ProShares Bitcoin Strategy ETF BITO.P falls 5.4%; iShares Bitcoin Trust ETF IBIT.O down 5.3%
(Reporting by Tharuniyaa Lakshmi in Bengaluru)
((tharuniyaa@thomsonreuters.com))