Harmony, once pitched as a faster Ethereum rival, wants to switch itself off. In a September 6 proposal, the project’s developers asked the community to approve a voluntary shutdown of the seven-year-old blockchain, migrate the native ONE token to Ethereum and redirect token emissions to an AI video business. It is a rare move for a layer-1 network: an orderly sunset instead of a slow fade into dead-chain status.
The stated reason is security economics. The team wrote that state actors and increasingly capable AI agents have made defending the network too difficult and too expensive to sustain. Harmony runs a sharded proof-of-stake design with hundreds of validators, and the developers argue that the cost of keeping that validator set and its infrastructure safe against adversaries of that scale no longer matches what the chain earns in fees and usage.
The framing matters because it comes from the builders themselves, not from regulators or auditors. Most chains that die do so quietly, with development stopping and liquidity leaving while the ledger technically keeps running. Harmony is instead asking permission to end, which turns a slow decay into a governance question with a deadline.
A migration, not a rug pull
Under the nonbinding plan, ONE holders would receive a wrapped equivalent on Ethereum, keeping the token tradable while the independent Harmony mainnet goes dark. The proposal is explicitly a request for community sign-off, not an executed decision, and no shutdown date has been fixed. Token holders would keep an asset after the shutdown, though its form and custody arrangements remain to be worked out.
The second half of the plan is more unusual. Rather than winding down entirely, the team wants to point the chain’s remaining emission schedule at an AI video product, effectively converting a security budget into a startup budget. Critics on social platforms were quick to note the irony: a project citing AI agents as an existential threat wants to become an AI company.
From 2021 darling to managed decline
Harmony launched mainnet in 2019 and rode the 2021 altcoin cycle hard, marketing sharding and sub-second finality at a moment when Ethereum fees were punishing and every new chain with a speed pitch could raise money. ONE traded in the top 50 by market capitalization for stretches of that year.
The network suffered a headline-grabbing exploit of its Horizon bridge in June 2022, with roughly $100 million drained, and never recovered its former activity levels. DefiLlama currently shows only a few million dollars locked across its protocols, a fraction of what the chain held at its peak. Developer activity and app launches thinned out over successive bear markets, and the project’s own recent roadmap leaned heavily on AI-branded experiments rather than core protocol growth.
Against that backdrop, the shutdown proposal reads less like a shock and more like paperwork catching up with reality. The chain has been functionally winding down for years. What is new is the willingness to say so in a formal proposal and to name the threat model, state actors and AI agents, that the team believes makes even maintenance untenable.
The team said state actors and AI agents had made defending the chain increasingly difficult and expensive, according to its September 6 proposal.
What happens next depends on governance. Validators would need to coordinate a finality halt, exchanges would need to support the ONE migration, and the emission multisig that controls rewards would need to be redirected. Any of those steps can stall. Precedents for voluntary layer-1 shutdowns are thin, which means the process itself will be watched as a template, wanted or not.
For holders, the immediate questions are practical: which custodians will honor the migration, what the conversion ratio will be, and whether an Ethereum-listed wrapped ONE holds value better than a token on a chain scheduled to die. The proposal answers none of that yet. ONE was trading down on the news, and the team has not said when a binding vote would open.
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