Haaland will not go to PSG, City already pays him a lot of money and he is getting a lot of success there, why would he want to leave? I would understand Real Madrid to a point because he could get a lot of success there as well, but why would he go to PSG when they already have so many strikers and still fail.
I think PSG should try to keep Mbappe as much as they possibly can, and if they can do that it would be great for them, but if they fail to do it then they could find some other players that could increase the overall value of a club. Like instead of replacing a 200 million dollar player, increase 5 places on the squad with 40+ million dollar valuation of the current roster, and you get a 200 million dollar increase anyway.
we should not think too far about where Haaland will go because this player will not leave Man City, even though Haaland has managed to find a team that suits him and a very reliable coach who is able to develop his talent even further so that he can achieve the UCL title this season. then at the same time get the treble winner title.
and regarding Mbappe, it is certain that Mbappe is much younger player who has the ambition to win the UCL title and titles in other competitions so it possible that Mbappe will still leave PSG in the following season to look for the right team that can lead him to achieve this. that he wants and I think Real Madrid. all of this is not only about money, but Mbappe really wants his name to be known as star player who has had a successful career getting a lot of titles while it was still easy so that too long at PSG without the guarantee of getting a title in another competition such as the UCL or the European league is just useless for him.