My three favorite players right now are Ronaldo, Messi and Mbappe.
For Ronaldo, his transfer to the Arab side Riyadh where Al Nassr club is located, came after his fall out with Manchester United and everyone knows it is a money move into retirement. Whether he will stay can only be confirmed later as we wait.
Messi right now is contented at PSG. After all, he is playing in the champions league and they still have the chance of clenching the title. His move back to Barcelona or inter Milan is but a mere speculation until confirmed from true sources.
The only person I see that might leave if the price is right is Mbappe. He is the youngest of the trio and with a lot of potential to display. Although I feel he would stay to battle it out with his team mates at PSG this season, I can't say if he would love to stay in coming season. He has to win awards and titles, otherwise, in two or three years, he might have a competition who is more hungry than him and with a lot of potentials too.
I really do not know in which way the career of Cristiano Ronaldo is headed. He is not being able to find any team. At least not in a team that is playing in the Champions League, which he wants. He is being offered a lot of money but he does not want money. He wants respect and finishes his career with a bang. He is obviously not able to do that.
Lionel Messi is still performing well. He has just won the World Cup for his national team. Obviously, this is the biggest achievement of his life. At least especially at this stage of his career. he is going to stay in PSG.
Mbappe is one who has a long future ahead of him. Already a lot of people are saying that he is staying in PSG just because of Money. And that is actually true. If he actually was that much interested in his career, he would have already moved to Real Madrid or any other club that has good competition in the league.