The altcoin market is experiencing its strongest expansion cycle since July 2025, with current 30-day growth reaching approximately 12.5%. CryptoQuant analyst Darkfost reported that total altcoin market capitalization surged more than 32% within a 30-day period in early September, with liquidity continuing to flow into the sector and sustaining the upward trend. Despite the ongoing strength of this expansion, Darkfost advised investors to maintain caution as markets do not move in straight lines. The analyst noted that while the current momentum may persist for some time, patience remains essential for those seeking altcoin exposure during this volatile growth phase.