As September approaches, fear, uncertainty, and doubt are rising in the crypto market, despite Bitcoin’s strong August performance where it rallied past a long-standing resistance level. Data from CryptoQuant indicates that September has historically been a difficult month for both U.S. stocks and Bitcoin. However, the pattern of consistent September weakness has weakened in recent years, with positive closes in 2023, 2024, and 2025, and strong spot and ETF demand could prevent a repeat of the traditional downturn in 2026.
With just three days until September, a sense of fear, uncertainty, and doubt is spreading in the crypto market. According to CryptoQuant, September could be a difficult month for both U.S. stocks and Bitcoin in 2026.
Investors should not assume that Bitcoin will automatically fall simply because it is September. Historical seasonality does not mean the month will be bearish every year.
Bitcoin’s September weakness was particularly notable from 2017 through 2022, when it posted six consecutive negative returns. However, the pattern weakened considerably afterward, with positive September closes in 2023, 2024, and 2025.
With strong spot and ETF demand, there is hope that the September effect could once again fail to materialize in 2026. U.S. stocks also have a historical tendency to underperform in September, with the S&P 500 averaging around -0.8% over the last 50 years.
The Coinbase Premium Index has recovered to 0.00 after remaining negative for 14 consecutive days. However, this zero reading means the Coinbase buying advantage has disappeared, representing a neutral point rather than bullish demand.
Bitcoin’s Spent Output Profit Ratio highlighted a notable improvement in investor profitability. After remaining below 1 for most of the month, the SOPR broke above 1 near the end of August, rising to around 1.01, indicating holders are increasingly willing to sell while still making gains.
Bitcoin’s Mean Coin Age continued its strong uptrend in August, rising from roughly 1.69K to above 1.70K. This suggested that a growing portion of Bitcoin’s supply was unmoved, rather than being actively sold or traded.
Bitcoin defied its historically weak August trend by gaining around 25.6% and pushing back toward the $80,000 level. With FOMO building and previously bearish on-chain indicators turning bullish, Bitcoin could be positioned for further upside into September.
