That's what makes this a bit illogical, with all that positive news about Bitcoin's accessibility and adoption for different businesses, why would it be going down still? Wouldn't people want to buy it because of those reasons?
How would OTC be the reason for the decline? It's just a marketplace where retailers buy and sell coins. That's like saying that the Nasdaq was the reason for the decline in tech stocks last week. The exchange mechanism is just a place for trading.
Maybe some of the central bankers are getting in line and shorting Bitcoin for shits and giggles.