But it is obvious that Dortmund won't be able to keep him after the end of this season. Dortmund need him definitely. But it won't be easy for them to keep a great striker like him here for a longer time. I wouldn't be surprised if Haaland wants to start playing bigger than this already. He shouldn't waste his time at Dortmund also. They don't even achieve a proper title while having him too. Then, what is the meaning in staying here for Haaland? He deserves to experience a Champions League title for example.
Haaland is a goal machine in Dormund, and If he leaves Dormund, it will definitely affect the club. You can remember how Dormund lost most of the matches they played without Haaland. However, I think it will be a nice idea about Haaland moving to another club. He have to experience new challenges, and probably play in another League. Chelsea wanted to sign him last transfer window, but Dormund refuse to let go of him. Nevertheless, IMO, Premier League will be a good choice for Haaland. He should move to either Liverpool, Chelsea or Manchester City.
Cases like this for Dortmund are not new, because before that many Dortmund strikers and Dortmund coaches have always been the target of big teams in the EPL and La Liga like Real Madrid and even Bayern Munich as well. We can see where they have come from before such as Robert Lewandowski, Aubameyang and Jurgen Klopp and maybe many more that many Dortmund players are recruited to the EPL and La Liga and they are anchored in the big teams in their respective leagues. So, the Haaland case is nothing new for Dortmund, somehow and sooner or later Haaland will certainly go to another club later.