I do think that the biggest factor is the governance by the whales.
They along with bigger companies holding a fair share of Bitcoins , tend to change the market according to their will and that's something that's not good .
The price also usually goes down around this time , but it doesn't drop that much.
I think also the festival season was near thus people encashed the Bitcoins and also the whales , summing up both of it could decrease the price of Bitcoins enormously , it could be the reason ..we cannot be sure of anything completely because it's decentralized.