Trend Timeline: Bitcoin has been in a recent mid-term downtrend since October. After completing the third phase of the mid-term decline, the rebound lasted quite a while, nearly 2 months. Starting from the 14th of this month, the rebound ended. Based on the current pattern, there is still a wave of decline on the weekly chart. Therefore, the ongoing half-year decline of Ethereum and Bitcoin can only be considered complete once this wave ends. The specific structure is shown in the diagram. Today, the short-term resistance for Bitcoin's rebound is mainly around 91,400. It is expected to decline again below 87,000 this week before a rebound appears on the daily chart. However, after the rebound, further downward movement is still needed, with a reversal point at 97,000.