Of course BigBang are still number 1. But I can imagine that Blackpink will be YG's next favorite or maybe is already. They are selling better than Winner, Ikon or any other other artist under YG (beside BigBang & Gd). Their sales, chart positions, youtube success plus their international success and that they are holding their first dome concert in Japan with a capacity of 51k shows how far they have come. Before that comeback Blackpink success was good but more average. Now they are doing amazing. Yg is posting almost always about Blackpink achievements so I think he is really proud.