Bitcoin Achieves Strongest August Performance Since 2017 Amid Warning Signs

Bitcoin has made headlines by achieving its strongest August performance since 2017, with gains of approximately 25-30%. The cryptocurrency rallied from early-August lows of around $62,000-$64,000, briefly surpassing $81,000 before settling between $78,000 and $79,000 by the end of the month.

This remarkable increase contrasts sharply with Bitcoin's historical performance in August, which has typically been one of its worst months, averaging a negative return of about 7% since 2013. The last time Bitcoin saw such a significant August gain was in 2017, when it surged roughly 65% and initiated a major bull run.

Several factors contributed to the recent rally, including expanded liquidity expectations tied to US Treasury bond buybacks and substantial inflows into US spot Bitcoin ETFs, which totaled $1.92 billion during the rally week. Additionally, Bitcoin's breach of its 200-day moving average at approximately $69,000 served as a signal for many trading strategies.

Despite the impressive monthly performance, Bitcoin remains down approximately 28-33% year-to-date and is trading significantly below its 2025 peak of around $126,000. The market dynamics in 2017 were notably different, with less institutional participation and no ETFs, raising questions about the sustainability of the current rally.

As September begins, three warning signs have emerged. Bitcoin's exchange balances have increased, particularly on Binance, which now holds around 687,000 BTC, the highest level recorded in 2026. This influx of supply could pose challenges if demand does not keep pace. Furthermore, US spot Bitcoin ETFs experienced a net outflow of $201.8 million on August 28, breaking a streak of inflows, which may indicate waning demand.

Analysts have also noted that the recent price movements may be driven more by leverage than by spot buying, raising concerns about the stability of the rally. Historically, September has been a challenging month for Bitcoin, averaging a 3.08% loss since 2013, although recent years have shown some positive trends.

New Facts

• US spot Bitcoin ETFs recorded $924 million in net inflows from August 24 to August 28.
• BlackRock’s iShares Bitcoin Trust led the inflows with $938 million.
• Despite strong ETF demand, Bitcoin's price remained below $80,000.
• Spot Ether ETFs added $824 million during the same period, with BlackRock’s ETHA fund leading that category.
• The nine-day Bitcoin ETF inflow streak ended on August 28, with a net outflow of $201.81 million that day.
• August 2026 is recorded as the strongest month for Bitcoin ETFs, with over $3 billion in net inflows.
• Bitcoin's price fell from around $79,500 to below $77,000 following a hawkish statement from Fed Chair Kevin Warsh.
• Bitcoin has struggled to close above its 365-day moving average, currently near $83,000.

Latest Developments in Bitcoin and Ether ETFs

• For the week ending August 28, 2026, U.S. spot Bitcoin ETFs saw net inflows of $924.5 million, while spot Ether ETFs attracted approximately $824 million.
• This resulted in a combined total of $1.75 billion flowing into crypto ETF products in just one week.
• BlackRock's IBIT contributed significantly, with $938.3 million of the Bitcoin inflows.
• Bitcoin ETFs have accumulated around $54.63 billion in cumulative net inflows since their launch in January 2024.
• Bitcoin approached the $80,000 mark during this period, while Ether surpassed $2,500.
• Ether ETFs, launched in 2025, are gaining traction quickly, narrowing the inflow gap with Bitcoin ETFs.
• Despite a $201.9 million outflow on the last day of the week, the overall weekly inflow remained positive, highlighting the strong demand for these products.