Moving Bitcoin to Ethereum starts with choosing the asset

To move Bitcoin to Ethereum, choose whether you want BTC represented on Ethereum or want to exchange your BTC for another asset there. Bitcoin and Ethereum do not share a ledger, so the route determines what arrives and who or what you trust along the way.

RenBridge once offered one route by issuing renBTC, but Ren announced the sunsetting of Ren 1.0 in 2022 after Alameda’s bankruptcy left it without funding. For the background on choosing a route after RenBridge’s shutdown, see the linked explanation; the practical question now is what kind of asset you need at the destination.

The route matters because “Bitcoin on Ethereum” is usually a token backed by a separate system, not BTC moving onto Ethereum unchanged.

What does Bitcoin become on Ethereum?

Most routes issue a token on Ethereum that represents Bitcoin held or controlled elsewhere. Wrapped Bitcoin (WBTC) is one example: it is an Ethereum token, while native BTC remains on the Bitcoin network.

That distinction affects what you can do next. Ethereum apps accept tokens that follow Ethereum’s standards, such as ERC-20; they cannot directly spend a Bitcoin UTXO, the transaction output model used by Bitcoin. Check the exact token and its contract address in the destination wallet or app before you send.

How do you choose a route?

Start with the result you need: a Bitcoin-backed token to use in an Ethereum app, or a different asset such as ETH. A bridge route generally locks or otherwise secures BTC and issues a token on Ethereum; a swap route trades BTC for another asset, sometimes through an exchange or a service that handles both sides.

Compare routes by looking at four things:

• Asset received: Confirm whether the destination is WBTC or another wrapped BTC token, ETH, or a different token.
• Custody and backing: Find out who controls the BTC reserve or signing process, and what lets holders redeem the Ethereum token for BTC.
• Total cost: Account for the Bitcoin transaction fee, bridge or service fee, any exchange spread, and Ethereum’s transaction fee to use or move the token.
• Exit route: Check how you would convert or redeem the asset later, including whether the route supports the destination you need.

A route that quotes a low fee may still be a poor fit if its token is not accepted by your intended app or redemption is difficult. For most users who want BTC exposure inside Ethereum apps, a clearly identified, widely supported wrapped token with a documented redemption path is easier to assess than an unfamiliar representation.

What should you check before sending?

Match the destination network, token and receiving address to the route’s instructions. An Ethereum address alone does not guarantee that the wallet or app supports the token, and selecting the wrong network can leave funds inaccessible through the intended service.

Read the route’s live quote and completion conditions before confirming: some routes require Bitcoin confirmations before the Ethereum token appears, and fees or timing can change with network activity. For a first transfer, use an amount small enough to verify the full path, including receipt and any intended redemption, before moving more.

Keep the receipt or transaction IDs from both networks. If the destination token is not native BTC, your ability to redeem it depends on the bridge’s contracts, reserves or operators, so treat the representation and its exit route as part of the decision.