Bitcoin is encountering market challenges as September 2025 unfolds, with long-term investors taking profits and a slowdown in new fund inflows. ETF and treasury companies have reduced their Bitcoin accumulation, contributing to a cautious market sentiment. Historical data indicates September typically yields negative returns for Bitcoin, further fueling market pessimism. The 25 Delta options skew has reached 15%, reflecting increased demand for risk protection. Companies like MicroStrategy are under bearish pressure, with rising put option premiums. Despite these hurdles, institutional investors, including public pension funds, are boosting Bitcoin allocations, offering structural support. Bitcoin's adjustment cycle is anticipated to last 6-7 weeks, while Ethereum's may extend 5-10 weeks, aligning with historical trends in the S&P 500 and suggesting investor caution.