August Jinx: Why Historically Weak Performance Data Could Haunt Crypto Markets

Historical data shows that Bitcoin and Ethereum often underperform in August. According to the data, Ethereum's average return in August is 6.74% since 2016, but its median return is -1.74%, indicating a few strong periods have skewed the average upward.

The strongest performance for Ethereum in August was seen in 2017 when it rose by 92.86%. However, it also experienced a sharp decline of 34.79% in 2018. The asset has exhibited volatile behavior in August recently, rising 8.13% in 2025 and gaining 2.95% in 2024.

Bitcoin's historical August performance doesn't offer a clear bullish signal for investors either. Its average return is 1.06%, but the median return is -6.99%, indicating that loss-making closes are more typical in August.