In April 2026, the cryptocurrency sector experienced a dramatic increase in security breaches, with 40 major hacks resulting in losses of $647 million. This marks a staggering 1,140% month-over-month increase from March's $52.2 million. Notably, the exploits of Drift Protocol and KelpDAO have entered the top 10 largest hacks since 2021, with KelpDAO losing $292 million and Drift Protocol $285 million. The KelpDAO hack involved the exploiter using rsETH to borrow large amounts of ETH from Aave, subsequently converting the funds into Bitcoin, which has raised concerns about bad debt within the Aave ecosystem. In response, DeFi United is spearheading efforts to mitigate the liquidity shortfall and prevent further systemic risks. Other significant hacks in April include Rhea Finance with $20 million, Grinex with $13.74 million, and Wasabi Protocol.