Bitcoin rises more than 5% above $81,000 as markets cut September Fed rate hike bets following Governor Christopher Waller's comments.

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 held above $77,000 through the Asian and European sessions and the U.S. open after ADP reported 38,000 August private jobs. Polymarket puts a September Fed increase at 59%.