Approximately 62 WETH, worth around $133,000, sits on Sei in a format that will become inaccessible once the network votes to shut down its IBC (Inter-Blockchain Communication) bridge layer. IBC is the standard messaging protocol that connects Cosmos-based blockchains. When Sei disables it, any asset that arrived via IBC, including this Wormhole-wrapped WETH, will be frozen in place with no path out. Sei Labs said it will publish a governance proposal with advance notice before the restriction activates, but has not specified a minimum notice window.

The WETH case illustrates a wrinkle that may catch some users off guard. WETH (Wrapped Ether) is an EVM-native asset on Ethereum, but the version circulating on Sei arrived through Wormhole and was then transferred via IBC. That routing means it is classified as a Cosmos IBC token on Sei, not an EVM token, and is subject to the same restrictions as any other Cosmos asset on the network. Users holding it have two options: swap it for an EVM-compatible asset on a decentralized exchange such as Saphyre or Symphony, or bridge it out via Skip:Go to a supported destination chain. Anyone with this WETH posted as collateral in a lending protocol must unwind those positions first before attempting to bridge out. The urgency is compounded by the history of the Wormhole bridge itself: in 2022, an exploit drained approximately 120,000 wETH, worth around $320 million at the time, a reminder of the risks that accumulate when assets remain stranded in deprecated or transitional bridge wrappers.

This warning follows two earlier advisories in 2026. One flagged roughly $245,000 in USDC bridged from Solana and Noble; another warned holders of about $145,000 in Kava USDT. The precise publication order of those two prior advisories has not been independently confirmed, and readers should consult Sei's official communications for the exact sequence. Each alert followed the same pattern: a software upgrade ships the technical capability to disable IBC, then a governance vote activates it. The upgrades have been rolling out under SIP-3, a community-approved plan that Sei voters passed in May 2025. The plan converts Sei from a dual Cosmos and EVM chain into a pure EVM Layer-1 blockchain. The most recent step, version 6.4, deployed to mainnet on April 13. It added the protocol-level switch needed to cut off inbound IBC transfers. Sei's documentation describes the end state plainly: "Only EVM addresses will be able to initiate transactions and all Cosmos message handling will be removed."

As of the research underlying this article, Sei Labs had not yet formally submitted a governance proposal to disable IBC transfers. Readers should verify the current proposal status on Sei's governance portal before taking time-sensitive action, as the situation may have changed since publication.

The rationale Sei has offered centers on simplicity and performance. The team has said the goal is to "reduce complexity, improve developer experience, and position Sei more competitively within the broader EVM ecosystem while maintaining its performance advantages." The chain is targeting a performance upgrade called Sei Giga later in 2026, though the throughput targets associated with that upgrade have so far been demonstrated only under devnet conditions and have not been validated at production scale. Sei's current on-chain metrics reflect a network in a transitional phase. SEI trades around $0.057, giving it a market cap of roughly $381 million and a CoinGecko ranking of 120. Total value locked on the network sits near $41.6 million, a decline of more than 93 percent from a peak of approximately $626 million in July 2025. Daily active users have fallen from over 2 million at peak to between 1 million and 1.2 million currently.

For users in South Asia and Africa, the migration matters in ways that go beyond the immediate asset warning. Sei announced a partnership with Xiaomi in December 2025 that will see Sei wallets pre-installed on Xiaomi phones. Xiaomi holds roughly 24 percent of the smartphone market in India, according to figures cited by CoinDesk in December 2025, and the company sells devices in Nigeria and Kenya as well, giving it a footprint in two of the continent's largest crypto-active markets. The users Sei is targeting through that partnership will land on an EVM-only chain and will never encounter Cosmos or IBC at all. The IBC wind-down is, in that sense, preparation for a new user base. Developers in these regions face two additional implications worth noting. First, Sei has launched a $5 million Global Mobile Innovation Program aimed at consumer-facing decentralized applications for mobile, a particularly relevant initiative in mobile-first, low-bandwidth markets. Second, SIP-3 includes the deprecation of CosmWasm, the smart-contract framework used widely across the Cosmos ecosystem; teams in South Asia and Africa who have built or been exploring CosmWasm applications on Sei will need to migrate their contracts to EVM-compatible alternatives. For the smaller cohort of Cosmos-native power users in these regions who may have bridged assets across chains to Sei, the lack of a hard deadline on the governance vote creates real uncertainty. Sei Labs has committed to advance notice, but given that prior warnings came with similarly vague timelines, holders should treat this as urgent.

The timing sits in contrast to broader Cosmos ecosystem activity. Interchain Labs launched IBC Eureka in April 2025, a protocol that connects Cosmos chains to Ethereum using zero-knowledge proofs and sub-dollar transfer fees. Sei is removing IBC at the same moment the rest of the Cosmos ecosystem is expanding its reach toward Ethereum. Whether Sei's EVM-only bet strengthens its competitive position or costs it interoperability advantages will become clearer as the final SIP-3 milestones execute through mid-2026. The next scheduled upgrade, version 6.5, will remove Sei's native oracle from the codebase. After that, a formal governance vote to disable IBC transfers is expected. That vote is not, however, the final step: the SIP-3 roadmap calls for a separate subsequent milestone in which full Cosmos message handling is removed from the codebase entirely, leaving only EVM addresses able to initiate transactions. That last milestone, not the IBC vote, marks the true completion of Sei's transition to a pure EVM chain.