Layer 1 区块链项目 SEI 近日向社区发布重要提醒，警告持有 USDC.n 的用户需在 3 月计划中的网络升级前，将资产兑换为“原生 USDC”，否则可能面临无法使用或价值受损的风险。这一提示引发了市场对 SEI 稳定币结构调整的高度关注。
USDC.n 是通过 Noble 网络发行并桥接至 SEI 的 USDC 旧版本。在 Circle 尚未在 SEI 网络原生发行 USDC 之前，USDC.n 一直是 SEI 生态中使用最广泛的美元稳定币。随着 Circle 推出 SEI 原生 USDC，这一过渡版本正在逐步被淘汰。
链上数据显示，目前 SEI 网络中经 Noble 发行的 USDC.n 规模约为 140 万美元，已明显低于此前的数百万美元水平。原因在于，越来越多用户正在主动将 USDC.n 兑换为 SEI 官方支持的原生 USDC，以规避潜在技术与流动性风险。
SEI 计划于 3 月实施关键的 SIP-3 升级。该升级将弃用 CosmWasm 和 Cosmos 原生资产体系，使 SEI 完全转型为仅支持 EVM 的区块链架构。SEI 官方明确表示，升级完成后，USDC.n 可能在网络上无法访问，或因兼容性问题而出现贬值风险。
针对不同规模的持仓用户，SEI 给出了具体操作建议。小额 USDC.n 持有者可通过 DragonSwap 或 Symphony 进行直接兑换；而大额用户则被建议使用 Brr 提供的转换工具，将资产从 Noble 批量转移至 Polygon，并最终通过 Circle 的 CCTP 跨链协议换回 SEI 网络的原生 USDC。
Noble 是一个由 Cosmos 生态支持的应用链，专注于为 Cosmos/IBC 网络发行原生资产。它在 Circle、Hashnote Labs、Monerium、Ondo Finance 等稳定币发行方与 Cosmos 区块链之间扮演中介角色。早在 2023 年底，Circle Ventures 就已向 SEI 网络投资，并推动 USDC 在 SEI 的原生部署。
整体来看，此次 USDC.n 迁移提醒不仅是一次技术升级提示，也反映出 SEI 正加速向 EVM 生态靠拢。对于关注 SEI 升级、USDC.n 风险、SEI 原生 USDC 以及稳定币跨链迁移的用户而言，提前完成兑换将是降低不确定性的关键一步。
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