"Without black swans, there wouldn't be a drop to xxxxx" is logically incorrect.
1. Black swans are unpredictable. The implication of this statement is that one knows whether there will be black swans or not. If they are unpredictable, how can one know if there are black swans?
2. Black swans are merely accelerators, not causes. The essence of a decline is that no one is buying $BNB