The more I've seen this in the recent days and weeks, the more I think this price move is related to:
https://www.cnet.com/news/us-largest-dark-web-market-bust-seizes-6-5-million-from-179-drug-dealers/

The general "theory" is that Tor was exploited, but instead they talk about tracing Bitcoin transactions. I'd put money on the fact they successfully analysed BTC transaction, whether through mixers (that have proven to be flawed), then easily associated these transactions to exchange withdrawals, debit card uses etc.
Seems like drug lords are learning to launder their money properly again, in a secure manner.