your answer would be valid if this is the bottom of the drop, if btc is still going to 1k or 100$ then btc passed from strong hands, to weak hands only to be picked up again by strong hands at lower price.

there is really noway of sorting who sold to who , but a general rule is , usually the noobs buy at the peak, sell at the bottom, so i would like to assume that the strong and the smart beeg selling btc from 19 k to 6k and now are re-buying it for cheap from the noobs who bought it high, and they will sell it for higher price later on before it collapses again.