August turned out to be not just a good month for Bitcoin, but a historic one. In two weeks, the asset recovered three months of decline, gaining roughly 28% and surpassing the $80,000 mark. This is the first time in 11 years that August closed in positive territory after the U.S. midterm elections. However, it's too early to relax: September is traditionally considered one of the most treacherous months for the market, and the current macroeconomic situation only amplifies the risks.

The main trigger of uncertainty is the recent speech by Fed Chair Kevin Warsh at the Jackson Hole symposium. His rhetoric turned out to be unexpectedly hawkish: the regulator signaled that a rate cut in the near term is unlikely. The market reacted instantly—the probability of a rate hike at the September meeting jumped from 45% to 60% within just an hour of the speech. This is a serious signal for all risk assets, and Bitcoin is no exception.

Why September Frightens Investors

September is historically the second-worst month for BTC. Analysts attribute this to the so-called "September effect": the close of the third quarter, funds preparing for tax payments, and portfolio rebalancing create downward pressure. Bitcoin's average return in this month is around −3%, although it has closed in positive territory for the past three years—which, however, only adds to the intrigue.

Warsh also outlined key macroeconomic points that will drive market dynamics:

  • The labor market remains resilient: unemployment is around 4.1%, jobless claims are low, and consumer spending is rising.
  • Corporate capital expenditures are increasing by roughly 9% year-over-year, largely driven by AI development.
  • Inflation, as measured by the PCE index, is holding at around 3.7% versus the 2% target, and half of goods and services are rising in price by more than 3% annually.
  • The regulator is not confident in a sustained move of inflation toward the target, which rules out loose monetary policy.

A high rate strengthens the dollar and boosts the appeal of U.S. Treasuries, forcing investors to demand a risk premium from stocks and cryptocurrencies. Bitcoin, as the asset most sensitive to global liquidity, finds itself under pressure.

Key Dates and Levels

Bitcoin's fate in September will not be decided in a single day, but there are dates that stand out. The release of August CPI on September 11 will be the main report of the first half of the month. If inflation comes in higher than expected, the probability of a rate hike could jump to 70–80%, and then the $74,000–75,000 support would become a key line of defense. A break below this level would open the path to $70,000–72,000.

However, I believe the most important event is the expiration of quarterly Bitcoin options on September 25. Open interest stands at about $12 billion, and the structure of positions indicates that many traders are pricing in a drop to $70,000. This sets the stage for heightened volatility and false breakouts in the second half of the month.

My base case is consolidation in the $74,000–84,000 range with a downward bias in the first half of September and an attempt to return to the upper boundary after the inflation data is released. A rise to $100,000 this month is unlikely, but I also don't expect a sharp crash—unless the CPI data delivers an unpleasant surprise. Investors should be prepared for heightened volatility and not give in to emotions.