Bitcoin spot ETFs in the US just saw their strongest single day in months. Monday's session brought in $697 million in net inflows—the biggest move since October. BlackRock's IBIT product dominated the action, pulling in $372 million on its own. The data paints a picture of renewed institutional interest flowing back into spot Bitcoin exposure through these regulated channels. When you're seeing flows like this, it typically signals that major players are adjusting their positions or betting on near-term momentum shifts. The gap between IBIT's numbers and the overall total shows how crucial BlackRock's product has become in the broader ETF landscape for Bitcoin exposure.