According to Cas Abbé (@cas_abbe), experienced traders closely monitor five key signals to anticipate an upcoming altseason. The first and most important indicator is a drop in Bitcoin dominance, which suggests capital is flowing from Bitcoin into altcoins (Source: Cas Abbé, Twitter, May 28, 2025). This shift typically precedes significant price action in altcoins, offering traders opportunities for timely entries. Watching these signals can help traders identify profitable moments for altcoin trading before the majority reacts.