09/03/2026
Bitcoin just had its best August since 2017. September is already testing the rally.
Bitcoin gained roughly 25% in August, its strongest monthly performance since November 2024 and its best August since 2017. But as September begins, the macro backdrop is becoming significantly less friendly.
The key signals:
• 📈 BTC: +25% in August
• 📉 September: Bitcoin's worst-performing month on average since 2013, with an average decline of ~3%
• 🟢 Only 5 of 13 Septembers since 2013 produced positive returns
• 📊 U.S. 10-year Treasury yield reached 4.784%
• 💵 Markets priced a 66% probability of a 25 bps Fed hike on September 16
• 🛢️ WTI crude climbed toward $88–$90 per barrel
• 💰 Bitcoin ETFs recorded $237M in net outflows on Tuesday, while Ethereum ETFs still posted $8.6M of inflows
The setup is now a battle between strong crypto-specific liquidity and tightening macro conditions.
ETF inflows, digital-asset treasury demand, and growing on-chain activity remain important tailwinds. But higher bond yields, elevated oil prices, inflation concerns, and renewed expectations for Fed tightening can pressure liquidity across risk assets.
Seasonality adds another layer, but it shouldn't be treated as destiny. Bitcoin has actually finished each of the last three Septembers higher.
The real question for September isn't whether “Rektember” returns. It's whether Bitcoin can absorb a tougher macro environment without giving back August's gains.
September 16 could be the key macro checkpoint.