As a London-based fintech analyst, I’ve seen how DeFi’s wild west meets institutional gatekeepers. Now, a $20 million crypto ‘pig butchering’ scam has landed Citigroup in federal court — not for fraud, but for failing to stop it. This case isn’t just about one victim; it’s a wake-up call for banks to act like sentinels, not silent spectators. Let’s break down why this matters — and why your digital wallet might be safer than your bank account.