We still don't know that but at least I'm sure Monaco will continue to play well until the end of the season and the transfer window will open and at that time there will also be changes in strength in the teams that are updating their squad. Especially PSG who also want to improve their squad, I'm sure they will provide many surprises in the transfer market next winter.
PSG still has the possibility to dominate in Ligue 1. but Monaco also has a chance if PSG doesn't make immediate improvements this season. and it was Monaco's chance to prevent PSG's dominance.
After nine rounds we have interesting situation in this season with few top clubs are staying out of the top ranks which is surprising specially Lyon at the bottom and Lens in near relegation zone but PSG which is the most powerful club in French League also struggling and have third spot with Monaco at the top and Nice which is only club without any defeat at the second spot most chances this situation will be going for few more weeks or until winter vacation because after this mostly clubs will give their best and try to narrow difference of points which will bring improvement in performance and quality as well which is much needed.
PSG is surely still favorite, but few clubs are giving their best and trying to have something positive which is good sign, but their available sources are not like PSG which will give them better advantage near the end of this season for having better result.
Of course, in my opinion, PSG is favourite as well. Because I just can't think of another team which will actually be able to give good competition to PSG for the title throughout the whole season. I think the competition is going to die out towards the end of the season. And PSG will be the only team to still stand tall. Even with all the problems that they had to face in this season. Monaco and Nice did very well to actually be at the top of the table right now. The one team that has actually surprised me is Brest. But recently it seems like the good performance phase is over for them.