Bitcoin traded below $78,000 during Monday's Asian morning hours, down less than 1% in 24 hours but up about 1% for the week, according to CoinDesk data. Solana and Dogecoin led the declines, both falling about 3%. The Japanese yen breached the 160 mark against the dollar in Tokyo on Monday, with strategists suggesting intervention could be triggered around 161. This follows a broad strengthening of the dollar, which also suppressed the cryptocurrency market, driven by expectations of higher U.S. interest rates after Federal Reserve Chairman Warsh's speech at Jackson Hole.