The article highlights significant failures in decentralized finance (DeFi) during November 2025, notably through the collapse of Stream Finance's xUSD, Elixir's deUSD, and other synthetic stablecoins. These incidents reveal deep-rooted issues with risk management, transparency, and accountability in DeFi. Stream Finance, which promised an 18% annual return on USDC deposits, ultimately failed due to a lack of basic financial oversight. Users blindly invested hundreds of millions, drawn by returns far exceeding traditional lending markets, without understanding the risks involved. Stream’s collapse wasn’t the result of a typical exploit; it stemmed from complex financial practices that masked systematic fraud. The mechanics involved recursive lending and excessive minting of xUSD without adequate backing. For instance, Stream inflated its xUSD supply by creating synthetic assets far beyond its actual reserves, operating effectively as a fractional reserve system without oversight. The interdependence between Stream and Elixir further exacerbated the situation, with both stablecoins effectively collapsing together due to their mutual collateralization. Before the collapse, industry analysts raised red flags about the unsustainable leverage within Stream Finance. Despite warnings, users continued to chase high yields. When an external fund manager lost $93 million, panic ensued, leading to a 77% crash in xUSD's value within hours. The article also details a prior incident where a $60 million market dump exposed vulnerabilities in oracle systems, driving mass liquidations across the DeFi landscape. This series of events underscores a critical lack of resilience and oversight in DeFi protocols, raising alarms about the industry's sustainability.