Generally supportive of this direction.
One of the largest untapped opportunities in DeFi remains native BTC capital, and Babylon’s approach is particularly interesting because it seeks to avoid the custodial and bridge-related assumptions that have historically limited Bitcoin participation in onchain lending markets.
Aave V4’s Hub-and-Spoke architecture seems well suited for this type of experimentation, allowing the DAO to isolate risks while evaluating real-world demand for BTC-backed borrowing.
That said, the integration introduces significant technical complexity compared with traditional collateral assets. Before progressing to later stages, I would like to see additional detail regarding:
• Liquidation efficiency during periods of market stress.
• Economic incentives for challengers and arbitrageurs.
• Potential bottlenecks created by redemption timelines on Bitcoin.
• Oracle design and valuation methodology for vaultBTC.
• Worst-case scenarios if arbitrage participation becomes limited.
Overall, I view this as a potentially important step toward bringing native Bitcoin liquidity into Aave, but the operational and economic assumptions will be just as important as the underlying cryptographic design.