IMO, not only 3 teams but 4 teams in the top 4 positions can become candidates to get the title this season. We see the difference in points from Bilbao and Barcelona only 9 points and that could have happened. But logically it would not be possible Barcelona and Madrid must be defeated by Bilbao who in my opinion the performance is not so good.
The most important thing right now is to focus on Barcelona and Madrid. Because I have a strong feeling that only these two teams will win the title at the end of the season.
For the title fight, I am sure that only three teams have a much greater chance while Bilbao has no chance to compete with Barcelona, Atletico Madrid and Real Madrid. We ignore Atletico Madrid as one of the teams that also has the capacity to win the title, although in terms of experience, maybe only Barcelona and Real Madrid are quite favored, but with the points they have collected so far, maybe everything can still happen beyond prediction.
There are still some matches left and we can see how consistent the three teams are in collecting points because if one of them has problems winning, the standings can change again and I think this is interesting because there is still no one who is quite a favorite.