I see a slight drop in the price in the last couple of days and that made me think, why this might happen now.

My best
guess is that a lot of people might be converting bitcoins to fiat to enable them to buy cheap goods at retailers that are not
offering Bitcoin payments. Will you also cash out some bitcoins to shop at Walmart or Amazon or whatever retailer you shop
at, that are giving these massive discounts? This will surely explain the drop in the price, a week before Black Friday
starts.

I see no other major announcement that would explain the recent drop in the price.

I don't think the drop in bitcoin has anything to do with black Friday. The vast majority of stores that support this global action do not accept bitcoin as payment, and therefore the flow of bitcoin as a means of payment remains at the same level as it was. The fall is due to completely different reasons.