More people adopting crypto in general. Majority of people start by "investing" in btc. at the moment there is more to it as there is a hard fork due in mid of november so people who missed the free bitcoin cash in august ended up grabing (or still waiting) bitcoin gold in october are up to grab the opportunity for segwit2x too .

Also there was amazon news too which helped to soar btc too which in result has placed bitcoin in the eyes of many new people which are getting into cryptocurrency .