Bitcoin's notable long-term returns are primarily attributed to a limited number of brief, intense rally periods rather than consistent daily performance. According to NS3.AI, since 2012, fewer than 100 days out of more than 5,000 have been responsible for the majority of Bitcoin's gains. Notably, 11 significant rallies have contributed to over 500% returns. This highlights the difficulty of perfectly timing the market and emphasizes the importance of holding through volatility to benefit from these infrequent but substantial bull runs.