Bitcoin is getting more bearish because it is December as many investors are waiting for December to cash out. If you look at the bitcoin price history for every bullish year you might notice December is the month with the highest bitcoin sell up. During the bitcoin bullish market, many people are investing in bitcoin and wait for December to cash out, this is not something new it is just history repeating itself.
Usually that is the trend going into winter as majority of the investors will book their profit and enjoy their vacation time, but this time around we have institutional investors as well, so anything is possible, they do not take a break like the casual investors do but there will be a time period where they will be booking their profit.