Polymarket prices a September quarter-point Fed hike at 55.5% after Kevin Warsh's Jackson Hole speech, up from 28% Friday. Bitcoin holds $78,000, up 24.5% in August.

Bitcoin gave back some of its gains after Fed Chair Kevin Warsh talked tough on inflation, but Myriad traders are still leaning bullish.

Bitcoin fell 3.01% to US$77,838 on Friday after Fed Chair Kevin Warsh's Jackson Hole speech, with about US$488 million of crypto positions liquidated.