Ethereum vs. Sei: Which Layer-1 Crypto Has the Real Bullish Edge in 2025?

Ethereum’s native token, Ether (ETH), has flexed some serious strength so far in 2025, up approximately 40% year-to-date, showing resilience amid macro uncertainty.

Meanwhile, Sei Network (SEI) has witnessed a far rockier road: after a strong run earlier in the year, it’s now down by about 20% in the same period. The question arises whether or not Sei, due to its relatively undervalued status, can outperform its top-layer-1 rival, Ethereum, in the rest of 2025.

Let’s examine.

SEI vs. ETH Technical Outlook: Triangle Setups Paint Bullish Outlooks

SEI’s chart shows the token moving inside a symmetrical triangle pattern, often seen before strong breakouts. Currently, the price is testing the structure’s upper trendline as resistance.

A decisive breakout above this level could trigger a sharp move toward $0.469, up by over 40% from current prices, by the year’s end.

On the other hand, if SEI consolidates further into the triangle’s apex, the setup still favors bulls, with an upside target near $0.438, up by circa 30%, by the year’s end.

Either way, SEI must close decisively above its 200-3D exponential moving average (300-3D EMA; the blue wave) at around $0.347 to validate the upside setup.

Similarly, Ether’s price is testing the triangle’s upper trendline as resistance.

A breakout could send ETH toward $5,704, while consolidation into the apex would keep the upside target near $5,561. Overall, that amounts to 20-25% gains by the year’s end.

Therefore, from a technical standpoint, SEI looks poised to outperform Ethereum in dollar terms.

Ethereum vs. Sei Fundamental Outlook

Ethereum is pushing forward with its long-term scaling roadmap.

Recent developments include leanVM, an execution environment optimized for zkVM ecosystems, and research into SNARK-based consensus aimed at reducing latency.

On the adoption side, Ethereum’s DeFi ecosystem has grown to around $97 billion in total value locked (TVL), while stablecoin supply on the network stands near $156 billion.

As of August, Ethereum’s daily activity had reached record highs, with 2.4 million transactions and 1.2 million active addresses, supported by lower fees through layer-2 scaling.

Institutional flows into ETH-based ETFs and staking products remain strong, and corporate treasuries are increasingly holding ETH as part of broader tokenization and RWA initiatives.

Sei Network has taken a different path, focusing on interoperability through EVM compatibility.

Following the rollout of Seiscan and an EVM-only architecture, the network reported a 57% increase in daily EVM transactions and a 59% rise in active users, according to data resource DappRadar.

Sei’s ecosystem is expanding in gaming and DeFi, with TVL supported by projects such as Takara Lend and Splashing Stake. Stablecoin issuance is over $200 million, compared to just $1.2 million in March.

Chainlink’s integration adds further reliability, and the network has now surpassed 5 million unique wallets and 4.4 million daily transactions.

Which L1 Token Looks Stronger in 2025: SEI or ETH?

Ethereum remains the dominant layer-1 chain with unmatched scale, institutional participation, and infrastructure upgrades that continue to strengthen its position.

Sei, however, is showing faster relative growth in activity, ecosystem expansion, and stablecoin adoption, with technical setups suggesting stronger short-term upside potential.

ETH offers resilience and long-term credibility, albeit SEI presents itself as a higher-risk, higher-reward bet for traders looking at the remainder of 2025. The key will be whether Sei can sustain its momentum beyond speculative bursts, while Ethereum focuses on scaling and integration with global finance.