Bitcoin's recent rebound has faced resistance since peaking at 91991. Currently, the 91000-91500 range is a critical battleground. Not only is there resistance below the previous high, but the daily 20-day moving average is also nearby. Coupled with the previous high-volume trading zone, the triple pressure makes it difficult to break through. When it surged to 91991 on January 10, it left a long upper shadow, indicating heavy selling pressure at that level.

The 4-hour chart now shows a somewhat uncomfortable situation—RSI has turned downward, and a bearish arrangement is beginning to form. The trading volume during the rebound is still shrinking, which is not a good sign. The bears are gradually gaining control.

In the short term, 90500 is a consolidation center. If it falls below this level, the support at 89500 will be directly exposed.

**Trading Strategy**:
- Bitcoin: Short in the 91500-91000 range, targeting 90500
- Second Bitcoin: Short at 3110-3100, targeting 3050