[Matrixport: Is More Frequent Significant Decline Within 30 Days an Indicator of a Bear Market?] Matrixport's daily analysis suggests that to determine whether Bitcoin has entered a bear market, a common observation is whether significant declines within 30 days occur more frequently. During a bull market, drops exceeding 20% within 30 days are relatively rare; however, in a bear market, such declines tend to happen repeatedly. At the same time, market momentum had already weakened as early as mid-2025: from the perspective of the 30-day rate of change (ROC), the upward peaks have been consistently declining, and the buying momentum has been simultaneously diminishing. Experienced crypto investors understand that bear markets are a natural and recurring part of the cycle, often setting the stage for the next recovery and upward trend. However, bear markets typically do not decline in a straight line. Even within a broader downward trend, significant short-term rebounds often occur. Therefore, investors should remain disciplined and continuously seek more cost-effective opportunities in line with changing market conditions.