According to Cas Abbé, Bitcoin (BTC) is currently testing its 5-year trendline resistance, a pivotal level that has previously marked both cycle and local tops. Since 2021, BTC retests of this trendline have led to significant corrections, with price declines ranging from 40% to 80% each time (source: @cas_abbe, May 24, 2025). Traders should closely monitor BTC's ability to reclaim this resistance, as a successful breakout could signal the start of a major bullish phase and impact broader crypto markets. Failure to break through may indicate another substantial correction, underscoring the importance of this technical level for short-term and long-term trading strategies.