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Kylian Mbappe is regarded as one of the current person players of modern day football as well as the player that football fans globally are expecting to take center stage immediately Cristiano Ronaldo and Lionel Messi calls it a day from football. So it's absolutely understandable as Paris Saint Germaine do not want the France national team captain to leave Parc des Princes anytime soon.
That being said Mbappe looks like a player who's not ready to continue his career with the French champions beyond this season as it's already been reported that he's reached agreement to join Real Madrid next summer.
It will be difficult for a rivalry like Ronaldo and Messi to repeat itself if Mbappe still plays for PSG. Another talented player plays in the EPL, currently he is playing for Manchester City. The competition between Mbappe and Haaland will grow if Mbappe moves to the EPL or La Liga, Mbappe is very suitable for Real Madrid, especially since the club really wants his arrival.
Haaland immediately won the UCL trophy after playing for Manchester City, while Mbappe has never lifted the trophy. His age will increase as the years go by, if he doesn't immediately make the best decision for his future, he will forever regret not being able to win the UCL trophy. Even though PSG really wants the UCL trophy, there is very little chance of them being able to win it because when they face other strong teams in the UCL, PSG always loses mentally.