Bitcoin kept sliding on June 18 despite the Iran deal and falling oil, as the U.S. Fed's higher-rate signal, not fear, drives crypto lower with gold.

Brent crude plunges 15% below $79 as US-Iran deal reshapes oil supply outlook, putting Federal Reserve rate decisions and crypto risk assets in focus.

The Fed held rates but signaled it is more worried about inflation than growth in Chair Kevin Warsh's first meeting.