August turned out to be a surprise month for Bitcoin, defying the gloomy expectations of many market participants. In just two weeks, the asset not only recovered three months of losses but also demonstrated an impressive gain of about 28%, firmly establishing itself above the $80,000 mark for the first time since the start of the year. However, the euphoria may be premature: September, historically one of the most treacherous months for the leading cryptocurrency, carries a whole set of risks that could reverse the trend.
The key trigger for nervousness was the speech by Federal Reserve Chair Kevin Warsh at the Jackson Hole symposium. Contrary to the expectations of part of the market, his rhetoric was far from "dovish." The Fed made it clear that a rate cut in the near term is unlikely. Moreover, the probability of a rate hike at the September meeting jumped from 45% to 60% in just one hour, delivering a powerful blow to risk appetite.
Why September Frightens the Market
Tightening monetary policy is not the only headache for BTC holders. September is traditionally considered the second-worst month for Bitcoin in terms of returns, with an average result of about −3%. This phenomenon, known as the "September effect," is linked to the end of the third quarter, fund tax payments, and portfolio rebalancing by institutional investors. This year, macroeconomic uncertainty adds to the mix: the labor market remains resilient, but inflation (the PCE index at around 3.7% against a 2% target) continues to pressure consumers and companies.
I highlight several key dates that will determine market dynamics in the coming weeks. First and foremost, September 11 – the release of the Consumer Price Index (CPI) for August. This report will be the main trigger for movement. If inflation comes in below forecasts, the likelihood of a rate hike will decrease, and Bitcoin could quickly return to the $80,000–84,000 range. If the data turns out "hot," the probability of tightening could rise to 70–80%, which would send prices down to the key support at $74,000–75,000, and if that breaks, to $70,000–72,000.
Key Levels and Scenarios
I consider consolidation in a wide range to be the base scenario. A move toward the lower boundary at $74,000–75,000 would require spot ETF inflows of $400–800 million. A recovery to $80,000 is possible with inflows of $800 million–$1.2 billion, while a surge to $84,000–85,000 would need $1.5–2.5 billion. Given that about $3 billion flowed into ETFs over ten trading days in August, such figures look achievable but not guaranteed.
Special attention should be paid to the options expiration on September 25. Based on the structure of open interest, a significant portion of traders is pricing in a drop in Bitcoin to $70,000. This sets the stage for heightened volatility and false breakouts in the second half of the month. I consider this date critical for determining the medium-term trend.
My conclusion: September is unlikely to bring us a rapid surge to $100,000, but I also do not expect a crash scenario. Most likely, we will see volatile trading in a range with a downward bias in the first half of the month and an attempt to return to $80,000+ in the second, provided that inflation data does not spring any unpleasant surprises. Investors should be prepared for sharp movements and not give in to emotions.