13000 BTC means nothing in the crypto market or even in the BTC market alone.
These kind of news whenever the market bleeds means nothing, they just try to find that " why the market is bearish ", they simply forget the fact that this is how market works, waves of ups & downs till eternity, old news, nothing new about this.
Meh, I think that's kind of a large amount actually although I won't fully count that incident to be the 100% reason of this bearish market we're currently having.
This ain't 2010's no more to say that 13k BTC is just a small amount.
@OP
I had read this news already before the day you posted and I think that we should be starting to see a bit of a recovery now, because it seems like many have already bought when the price was still like stabilizing around 5k that took a while to breach 6k.