Bitcoin opened at $79,093.85 Tuesday, 1.6% below Monday, then fell to $78,370.62 by mid-morning as new attacks followed weekend military exchanges between the US and Iran. Oil back near $100 a barrel is the transmission mechanism that matters here, since it feeds the inflation problem one week before the Fed meets. Ethereum opened at $2,489.84, down 1%, and slipped to $2,473.66.