DeFi's Classic Hack Playbook Is Dying — But the New Threat Can Take Down Six Chains at Once

WHY IT MATTERS

Think of early DeFi hacks like someone finding a broken lock on a single house — dangerous, but contained. The new risk is more like discovering that hundreds of buildings all use the same faulty electrical wiring. If something goes wrong, it doesn't just affect one building — it can cause a blackout across an entire city. As DeFi protocols expand to work across multiple blockchains (like Ethereum, Arbitrum, Solana, etc.), they often share the same underlying tools and connections. This means a single bug or exploit could drain funds from many chains at once, making the potential damage far greater than anything we saw in DeFi's early days. For newcomers, this is a reminder that 'diversifying across chains' doesn't always mean diversifying risk if those chains share the same infrastructure underneath.