European banks just stashed €2.5 trillion overnight with the ECB. Yeah, you read that right—2.5 trillion. This kind of deposit surge tells you something about what's happening in the traditional financial system: banks are parking serious cash with the central bank overnight, which typically signals either excess liquidity in the market or caution about short-term funding. When institutions move this much money around, it ripples across all asset classes. Crypto traders keeping an eye on macro flows know that central bank deposit behavior like this can shift capital allocation strategies across both traditional and digital assets.