**[Analysis: Yen Strength Boosts Bitcoin, but Arbitrage Risks Heat Up]** Odaily Planet Daily reports that the yen has been strengthening recently, driving the U.S. Dollar Index (DXY) downward and providing short-term support for dollar-denominated assets like Bitcoin and gold. Data shows that the USD/JPY pair fell 1.4% intraday to 156.40, following a 0.9% drop on Wednesday. Meanwhile, the euro, pound, and Australian dollar all posted slight gains against the dollar. As a result, the DXY fell 0.4% to 99.22, nearing its 200-day moving average. Analysts believe this trend generally benefits dollar-denominated assets like Bitcoin, while also easing global financial conditions and boosting market risk appetite. However, if the yen appreciates too quickly, this logic could reverse rapidly. Over the past decade, many investors have utilized low-cost yen financing to invest in stocks, bonds, and even cryptocurrencies. A rapid yen appreciation could trigger the unwinding of yen carry trades, leading to a sell-off in risk assets. In August 2024, when yen carry trades were unwound, Bitcoin dropped approximately 20% within a few days. Currently, market expectations are rising for the Bank of Japan to raise interest rates from 1% to 1.25% on September 18, putting further upward pressure on the yen. The report also notes that U.S. and Japanese officials have previously taken action to address "disorderly yen movements." Therefore, while moderate yen appreciation is currently favorable for Bitcoin, a rapid and disorderly rise could instead become a risk factor for BTC. (CoinDesk)