There are no experts in crypto, just people that got lucky by investing early. The drop occurred at the same time as the bitcoin cash battle so that was the trigger that started the panic dump
I think Calvin Ayre caused this.
https://mobile.twitter.com/CalvinAyre/status/1064928118065061889He said"
@ProfFaustus
has any interest in chains that do not scale. Accepting my offer would have Craig completely out of the ABC chain. If not, hash war continues until the cheating transient hash is gone. "
After the BCH hash war is over, he will attack bitcoin.