Vitalik: DeFi must end auto-liquidations on BTC flash crashes

Bitcoin's flash crash below $68,000 triggered roughly $400 million in liquidations in under an hour on Jun 2, and Vitalik Buterin's response was structural: he wants DeFi lending protocols to stop leaning so heavily on price-triggered automatic liquidations during volatility events.

Why it matters

The speed of the cascade — hundreds of millions in longs wiped in minutes — highlighted a reflexive flaw in on-chain lending markets. When price falls, liquidations fire into thin books, pushing price further down, which triggers more liquidations. Buterin's framing treats the auto-liquidation engine as the bug, not a feature that needs to be tamed. Crowded bullish positioning amplified the move: the selloff punished over-leveraged longs first, the exact cohort that auto-liquidation is designed to discipline.

Market impact

For DeFi builders, the read is a license to design softer deleveraging — partial liquidations, oracle buffers, grace periods, or Dutch auctions that price recovery into the unwind. For traders, the consequence is harder pricing on tail-risk hedges. Bitcoin's drop under $68K is the most visible example so far of the fragility Buterin is trying to design around.