If Juventus can't make a better performance then there's no way Juventus will end the season in the top four, even for the top six if Juventus' performance continues to deteriorate then it's difficult for him to finish in the European zone. But we also still expect players who are currently injured to recover soon like Chiesa and Pogba, who knows Juventus will return to their best form when they can play again. At least, if they recover quickly then Juventus won't need to sign any more players because it will ruin their finances even more.
Juventus is most valuable team in Serie A than other team like Napoli, AS Roma, Inter and Milan, I think if reach top forth standing position only at the end this season not enough depending how much money spent on every window transfer. Should looking forward with transfer window activities and Juventus always made transfer on both window transfer seems should get Serie A tittle, another competitor team they don't have much money active on window transfer.
Badly if Juventus just reach on European zone only because they have many great player recruit on last window transfer but finish out top forth standing position, maybe last winning against with Bologna make confidence again for Juventus reach to top standing position.