Bitcoin Collateral on Aave V4? Babylon Labs Says, “Hold My Crypto”

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Key Highlights (Or, as We Like to Call Them, the Bits That’ll Make You Go ‘Hmm’)

  • Aave’s considering letting you use native Bitcoin (BTC) as collateral in V4, thanks to Babylon Labs. No more wrapped BTC, no more custodians-just pure, unadulterated Bitcoin magic.
  • The system? Trustless Bitcoin Vaults. Your BTC stays snug on the Bitcoin network while a cheeky mirrored record (vaultBTC) does the borrowing tango on Ethereum.
  • This proposal pops up after Aave’s April 2025 exploit, where $190M in bad debt taught everyone that security isn’t just a fancy word for ‘overcautious.’

Ah, the Aave DAO-those decentralized decision-makers-are now eyeing a proposal from Babylon Labs that’d let you use native Bitcoin as collateral in Aave V4. Because why wrap your BTC when you can just… not?

This idea’s still in the “temp check” phase, which is governance-speak for “let’s chat about it over a virtual pint.” The goal? Let users borrow against their Bitcoin without bridges, wrapped tokens, or custodians playing middleman. Simple, right? Like explaining blockchain to your gran.

Babylon Labs took to X (formerly known as Twitter, because why not rename everything?) on Monday to ask for “community input” on two new Aave V4 Spokes. Catchy names: the Babylon Core Lending Spoke and the BTC Vault Swap Spoke. Together, they’re the dynamic duo connecting Bitcoin to Ethereum borrowing. Because why not let two blockchains play nice?

Babylon Labs submitted a Temp Check to Aave DAO to integrate Trustless Bitcoin Vaults with Aave V4.

This would allow native BTC as collateral and introduce two new V4 Spokes, one for borrowing against BTC and one for post-liquidation settlement.

– Aave (@aave) May 25, 2026

How It’d Work (Or, the Bit Where We Pretend to Understand Cryptography)

Under this proposal, you’d lock your BTC on the Bitcoin network using Trustless Bitcoin Vaults. Your BTC stays put, secured by Taproot-based scripts-because who doesn’t love a bit of Taproot?

Meanwhile, a mirrored version called vaultBTC appears on Ethereum. Don’t worry, it’s not actually moving your Bitcoin-it’s just a cryptographic wink and nod saying, “Yeah, that BTC’s locked up tight.”

You then use vaultBTC in Aave V4 to borrow stablecoins or wrapped BTC. If things go south and your loan gets liquidated, the BTC Vault Swap Spoke steps in. It lets liquidators swap the seized BTC into WBTC for a quick settlement. Later, the real Bitcoin gets redeemed on the Bitcoin network via a proof system. It’s like a crypto version of “I’ve got a receipt for that.”

The Trustless Bitcoin Vault system ensures your BTC never leaves the Bitcoin network. No bridges, no custodians-just cryptography doing its thing. And if someone tries to pull a fast one, there’s a challenge period to dispute invalid claims. Because even in DeFi, honesty’s the best policy.

Babylon Labs says this design’s as secure as a dwarf’s vault-and we all know dwarves don’t mess around with security.

Proposal Pops Up Post-Exploit (Or, When $190M Teaches You a Lesson)

This proposal arrives fresh on the heels of Aave’s April 2025 exploit, where attackers (allegedly the Lazarus Group, because why not blame the usual suspects?) exploited a cross-chain bridge on Kelp’s LayerZero infrastructure. They stole 116,500 rsETH by faking cross-chain messages-basically, the crypto equivalent of a con artist with a fake mustache.

The attacker then deposited the stolen rsETH into Aave, borrowed WETH against it, and left behind $190M in bad debt. Panic withdrawals spread across DeFi like a rumor in a small village, and risk teams froze markets faster than a wizard’s spell.

To fix the mess, a recovery coalition called DeFi United was formed. They raised over $300M in ETH commitments from big players like Lido, Ether.fi, LayerZero, Mantle, and Aave’s founder Stani Kulechov. Because when the crypto world goes wrong, it goes spectacularly wrong.

Aave and Kelp burned the stolen rsETH on Arbitrum to prevent reuse, and the Arbitrum DAO released 30,766 frozen ETH to aid recovery. Though, part of the process is still stuck in legal limbo due to sanctions-related concerns. Because even in DeFi, lawyers get a say.

After the exploit, Kelp ditched LayerZero’s verifier design and switched to Chainlink CCIP, admitting LayerZero wasn’t cut out for high-value transfers. Oops.

Babylon Labs’ proposal is now open for governance feedback. If approved, it could make Bitcoin a bigger player in decentralized lending-all while keeping BTC safe and sound on its own blockchain. Because sometimes, the old ways are the best ways.

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2026-05-25 22:13