Historical data from CoinGlass reveals a striking trend: Ethereum has consistently outperformed Bitcoin in May. With an average return of 28.45% and seven winning months out of ten, Ethereum shows strong seasonal strength. This pattern offers valuable insights for crypto investors in 2025.
According to CoinGlass, Bitcoin closed April with a gain of 11.87%. May, however, presents a mixed record for BTC. It has seven winning months and six losing months, with an average return of 7.61%. Ethereum, in contrast, boasts seven wins and only three losses. Its average return of 28.45% significantly surpasses Bitcoin’s performance. Notably, Ethereum has surged by more than 40% in several May months, including 2016, 2017, 2019, and 2025. This consistent outperformance suggests a recurring seasonal pattern.
Several factors contribute to Ethereum’s May strength. Network upgrades, such as past protocol improvements, often occur in spring. These upgrades boost investor confidence and network activity. Additionally, the broader crypto market experiences increased retail participation during this period. DeFi and NFT sectors, which heavily rely on Ethereum, also see heightened activity.
Market analysts attribute Ethereum’s May strength to major network upgrades in spring that improve scalability and reduce fees. Furthermore, institutional investors often increase allocations in Q2, providing capital inflow that boosts prices. Bitcoin, meanwhile, faces more macroeconomic uncertainty during this period, with interest rate decisions and inflation data influencing it more than Ethereum.
Historical comparison data from CoinGlass shows: in 2016, BTC returned +8.2% while ETH returned +45.1%; in 2017, BTC +12.5% vs ETH +42.3%; in 2019, BTC +6.8% vs ETH +41.7%; and in 2025, BTC +5.4% vs ETH +40.2%. This data clearly shows Ethereum’s superior performance, consistently delivering over 40% gains in these years while Bitcoin’s returns never exceed 12.5%.
Investors should consider these patterns when planning portfolios. Ethereum’s May outperformance offers a potential trading opportunity, however, past performance does not guarantee future results. Diversification remains essential. Bitcoin still holds value as a store of wealth with its lower volatility appealing to risk-averse investors, while Ethereum offers higher growth but with greater risk.
