Whoever has a definite answer probably has their own agenda but that doesn't mean it's not entertaining to speculate.
Discussion
News doesn’t move (any) markets, sentiment and positioning does. Media likes to assign a reason after the fact. Lots of leveraged long positions and stop losses were wiped out so a small dip became a big one by automated “sell at any price” selling. Occasional big surprises do move individual securities, but bitcoin is not a security.
So you are saying this was effectively a short squeeze. Some whale might have fat fingered something but the bulk of the volume was just stop losses.
Feel free. I was just stating my perspective