Bitcoin opened at $77,310.77 Thursday, essentially flat on the day, then recovered to $77,892.97 by mid-morning after an intraday low near $76,264. US airstrikes on Iranian targets over the weekend and this week ended a relative lull in the conflict, and Brent crude responded by climbing above $96 a barrel. Ethereum opened at $2,391.30, its weakest open in about two weeks, before edging up to $2,402.09.