August turned out to be a surprisingly strong month for bitcoin: in two weeks, the asset recovered three months of declines, rising by roughly 28% and breaking through the $80,000 mark. However, September will be a serious test of strength for the market. The key trigger is the rhetoric of the Federal Reserve, which, after Jerome Powell's speech in Jackson Hole, sharply shifted investor expectations: the probability of a rate hike at the September meeting jumped from 45% to 60% in just one hour.

This shift is not just numbers in futures. The market is pricing in tighter monetary policy, which automatically increases the appeal of U.S. Treasury bonds, strengthens the dollar, and forces investors to demand a higher risk premium for stocks and cryptocurrencies. Bitcoin, as the asset most sensitive to global liquidity, reacts to this first.

Why September scares the market

Historically, September is the second-worst month for BTC, with an average return of about -3%. This is tied to the close of the third quarter, fund tax payments, and portfolio rebalancing. But this year, an additional factor of uncertainty is layered on: Powell made it clear that there is still no sustained movement of inflation toward the 2% target. Unemployment holds at 4.1%, corporate capital expenditures are growing at 9% per year, and the preferred PCE index shows 3.7%—twice the target.

In my analysis, I highlight several key dates in September that will determine the trajectory:

  • September 1 and 4 — U.S. labor market reports;
  • September 10 — Producer Price Index (PPI);
  • September 11 — consumer inflation (CPI) for August, the main report of the first half of the month;
  • September 16 — Fed meeting with updated economic forecasts;
  • September 18 — Bank of Japan meeting, which could affect carry trades;
  • September 25 — expiration of quarterly bitcoin options with open interest of about $12 billion;
  • September 30 — release of the PCE index, shaping expectations ahead of the October meeting.

Which levels to watch

The base scenario is consolidation in the $74,000–84,000 range. A rise to $100,000 in September is unlikely, but I also do not expect a sharp crash. Inflows into spot ETFs in August totaled about $3 billion over ten days, which helped bitcoin grow from $64,000. Now, moving toward $84,000–85,000 will require $1.5–2.5 billion in new inflows. Without that, the market will likely pull back.

Before the CPI release on September 11, some investors will begin to take profits, which could push bitcoin to $74,000–72,000. If inflation data comes in weaker than forecasts and ETFs do not show major outflows, the probability of a rate hike will decrease, and the asset will quickly return to the $80,000–84,000 zone. Otherwise, the probability of a rate hike could rise to 70–80%, intensifying the correction.

Separately, I note the options expiration on September 25: the structure of open interest indicates that many traders are pricing in a drop to $70,000. This creates conditions for heightened volatility and false breakouts in the second half of the month. I consider this date key for determining the medium-term direction of BTC.

My final outlook for the month is movement in a wide range with a tendency toward decline in the first half of September and an attempt to return to $80,000–84,000 in the second half, if inflation data does not worsen the picture. However, seasonality should not be dismissed: over the past three years, September has closed in positive territory, so building a forecast solely on historical statistics would be a mistake.