How to Move Bitcoin to Ethereum: Every Method Compared
Rift Research
Last updated
You cannot move Bitcoin to Ethereum. Bitcoin does not exist there. Every method on this page gives you one of two things: a token representing a claim on BTC that someone else is holding, or a different asset entirely. The question worth asking is not which bridge is best. It is who holds the underlying Bitcoin, and what it takes to mint a new unit of the token you end up with.
Disclosure: Rift routes BTC into the Ethereum ecosystem and is covered below alongside every other method.
The short version
- Every wrapped BTC is a claim, not Bitcoin. The token is only as good as the custody arrangement behind it.
- The custody models split three ways: a single custodian, a federated multisig, or a threshold signer set.
- Only one major wrapper allows permissionless redemption. For the rest, end users sell on a DEX rather than redeem, because redemption runs through authorised participants.
- A wrapped asset carries counterparty risk for as long as you hold it. A native swap carries risk only for the duration of the trade. That is the single largest difference on this page.
- The failure mode is minting, not theft. In May 2026, roughly $76.6 million of eBTC was minted on Monad with no Bitcoin behind it after a bridge admin key was compromised. The attacker called the mint function.
- The best custody model is not always obtainable. cirBTC has the strongest reserve verification and roughly 40 BTC of supply. Availability decides more than design does.
The methods compared
| Method | What you end up holding | Who holds the BTC | Redemption | Reserve verification |
|---|---|---|---|---|
| wBTC | ERC-20 claim | BitGo and BiT Global joint venture, reported as a 2-of-3 multisig split across Singapore, Hong Kong and the US | Through merchants and authorised participants | Off-chain attestation |
| cbBTC | ERC-20 claim | Coinbase Prime, a single qualified custodian | Through Coinbase | Attestations published by Coinbase. No on-chain proof-of-reserves mechanism |
| cirBTC | ERC-20 claim | Circle National Trust, segregated from Circle's own assets. Issued by Circle International Bermuda Limited | Qualified institutions only, through Circle Mint | On-chain, via Chainlink Proof of Reserve. Reserve addresses publicly disclosed |
| tBTC | ERC-20 claim | Threshold Network signer set, using threshold ECDSA with a 51% signing threshold | Permissionless. Any holder can redeem back to native BTC | On-chain, through the signer set |
| FBTC | ERC-20 claim | Cactus Custody with an MPC signer set across Ceffu and Antalpha | Through authorised participants | Off-chain attestation |
| Native swap | A different asset. USDC, ETH, or whatever you swapped into | Nobody. You no longer hold BTC exposure | Not applicable | Not applicable |
Is it actually available to you?
Being live is not the same as being usable. Supply and liquidity decide whether you can get the token at all.
| Token | Approximate scale | Practical access |
|---|---|---|
| wBTC | The dominant wrapper. Roughly 119,000–120,000 BTC in circulation and close to 85% of the wrapped BTC segment | Deep DEX liquidity. Buy it anywhere |
| cbBTC | Roughly $5.4–5.9 billion, the fastest-growing wrapper since launch | Deep DEX liquidity |
| tBTC | Materially smaller than either | Available on DEXs, thinner books |
| FBTC | Smaller again | Limited venues |
| cirBTC | Live on Ethereum since June 2026, but supply was approximately 40 BTC across 11 holding addresses as of August 2026, with no established market price | Institutional only in practice. Mint and redeem run through Circle Mint and require a qualified relationship. You cannot meaningfully buy it on a DEX today |
The practical consequence. A better custody model does not help if you cannot obtain the token. cirBTC has the strongest reserve verification on this list and the least availability. That gap may close, and until it does the comparison is theoretical for anyone without a Circle Mint account.
What actually differs between them?
Three custody patterns, and the pattern determines what has to go wrong.
Single custodian. cbBTC and cirBTC. One entity holds the Bitcoin, publishes attestations and processes redemptions. You are trusting that entity to hold the BTC, account honestly, and honour the redemption queue. The failure mode is that entity, and there is no threshold to assemble.
Federated multisig. wBTC and FBTC. The underlying BTC sits behind an m-of-n scheme distributed across institutions in different jurisdictions. You are trusting that the federation does not collude and that no single party can assemble the threshold. wBTC's 2024 custody change put exactly this assumption under scrutiny.
Threshold cryptography. tBTC. A signer set with no privileged member, using threshold ECDSA at a 51% threshold. This is the only model on the list that supports permissionless redemption, which is its central design claim.
The practical consequence. For most wrappers, if you want your BTC back you sell the token on a DEX rather than redeeming it. That means your exit depends on secondary market liquidity, not on the redemption mechanism you were told about.
How long are you exposed?
This is the difference that matters most and the one that gets least attention.
A wrapped asset carries counterparty risk for as long as you hold it. There is no end date. Every day you hold wBTC or cbBTC is another day the custody arrangement has to keep working. If the issuer fails, is compromised, or is compelled, the token is a claim on something you cannot reach.
A native swap carries risk only for the duration of the trade. You send BTC, you receive USDC or ETH, and the exposure window closes when the trade settles. Minutes, not years.
The eBTC incident in May 2026 shows what a minting failure looks like in practice. Roughly $76.6 million of tokens were minted on Monad with no Bitcoin behind them after an admin key tied to the bridge was compromised. Within two days, wBTC and cbBTC were still publishing unchanged one-to-one attestations. The tokens looked identical on a block explorer. The difference was entirely in who held the Bitcoin and what it took to mint a unit.
The question to ask of any wrapper: who can mint a new token, and what would they need to compromise to do it without adding Bitcoin?
How do you actually get one?
Three paths, and most people use the first without realising the other two exist.
Buy it on a DEX or exchange. The common route. You are buying an existing token from someone who already holds it. You never touch the mint process, and your price is a market price rather than a redemption rate.
Mint through an authorised participant. Available for wBTC, cbBTC, cirBTC and FBTC. Practical for institutions with a custodian relationship, not for individuals.
Swap through a router. Send BTC, receive the wrapped token on Ethereum. Rift's OTC route settles BTC into cbBTC on Ethereum and Base. Other routers reach different representations depending on their integrations.
Which method should you use?
- You want long-term Bitcoin exposure and nothing else. Hold native BTC. Wrapping is a DeFi tool, not an upgrade, and it adds a counterparty for no benefit if you are not using the token in a protocol.
- You need BTC as collateral in Ethereum DeFi. Pick the wrapper your protocol actually accepts. Integration coverage decides this more often than custody preference does.
- Redemption matters to you. tBTC is the only major option with permissionless redemption. Everything else routes through authorised participants and you will exit on a DEX instead.
- You want programmatic reserve verification. cirBTC is the only wrapper here publishing on-chain verifiable reserves through Chainlink Proof of Reserve, with reserve addresses disclosed. cbBTC relies on published attestations instead. The catch is availability: cirBTC is currently institutional-only in practice, so this is a live option for a Circle Mint client and a theoretical one for everyone else.
- You do not need BTC exposure at the end. Do a native swap. The risk window closes when the trade settles rather than lasting as long as you hold.
Where other methods beat Rift
- If you want tBTC, cirBTC, wBTC or FBTC. Rift's OTC route settles into cbBTC. Any other representation is a different path.
- If you are already holding a wrapped token and want to switch. That is a DEX trade, not a cross-chain swap.
- If you have an authorised participant relationship. Direct minting avoids the market entirely.
- If your destination is not Ethereum, Base or Arbitrum. Rift covers four chains. Wrapped BTC exists on many more.
- If you want to hold native BTC. No method on this page beats simply not wrapping it.
Sources
- Custody model taxonomy, wBTC 2-of-3 structure, cbBTC and FBTC custody arrangements — Eco, "What Is a Wrapped Token?": https://eco.com/support/en/articles/15284398-what-is-a-wrapped-token
- Wrapper comparison, redemption mechanics and tBTC permissionless redemption — Eco, "Wrapped Bitcoin 2026": https://eco.com/support/en/articles/15220191-wrapped-bitcoin-2026-cirbtc-wbtc-cbbtc-tbtc-fbtc-compared
- cbBTC custody, chains and absence of on-chain proof-of-reserves; cirBTC custody and Chainlink reserves — Spark: https://www.spark.money/research/cirbtc-circle-wrapped-bitcoin-model
- cirBTC and cbBTC issuer comparison — Eco: https://eco.com/support/en/articles/15220189-cirbtc-vs-cbbtc-2026-circle-vs-coinbase-wrapped-btc
- eBTC minting incident, May 2026 — Phemex: https://phemex.com/academy/ebtc-vs-wbtc-vs-cbbtc-tokenized-bitcoin-comparison
- tBTC threshold ECDSA signing model — LX Research: https://www.lxresearch.co/analyzing-tbtc-against-wbtc-and-cbbtc/
- wBTC custody controversy and mint-and-burn mechanics — Coin Bureau: https://coinbureau.com/education/what-is-wrapped-bitcoin
- cirBTC launch timeline, issuer, custodian and Chainlink Proof of Reserve — Spark: https://www.spark.money/research/cirbtc-circle-wrapped-bitcoin-model
- cirBTC supply, holding addresses and Circle Mint access — KuCoin: https://www.kucoin.com/news/flash/circle-s-cirbtc-tokenized-bitcoin-asset-launches-on-ethereum-with-limited-circulation
- cirBTC mainnet launch and wrapped BTC market shares — Cryptonews: https://cryptonews.com/news/circle-launches-cirbtc-ethereum-wbtc-market/
Related: Best Way to Swap BTC for USDC covers the case where you do not want BTC exposure at the end. 12 Cross-Chain Swap Venues Compared covers the venues that execute these routes.