Starting from October 2025, whether in the U.S. stock market or cryptocurrencies, trading difficulty has increased to a new level, specifically reflected in: 1. The U.S. stock indices have been sideways for over four months, but individual stocks within have completed several rounds of rapid rotation; 2. While the internal rotation in the U.S. stock market is underway, the overall market liquidity has surged into the gold and silver (precious metals) sector, completing another off-market cycle; 3. The cryptocurrency market has entered a bear winter.