I still feel confident about the thing that we are going to see Mbappe at Real Madrid next season. Interestingly, he is still thinking about his options now but I don't expect him to decide to stay and play for his current team for at least one more season. PSG are still a hopeless case about winning the Champions League while Real Madrid are much better about it. Mbappe can play for them so many years and become even a Real Madrid legend too.
Whole this is your thought and I looks cool. If I am to be in Mbappe's shoes, I will stay in PSG for two more seasons. After all Mbappe is still young, after two years, Real Madrid will still come for him.
Mbappe should spend more time in PSG to have the record of the world most paid player. What is the essence of the football, is it not to make money? If I were him, I will not make that mistake of leaving psg. If he is in PSG, atleast he is sure of going to Champions league every year, with a better coach like Zidane, he could be a Champions league winner, who knows.?
After talking about this topic, Mbappe made up his mind not much time later. And he decided to stay at the end. I must admit that this decision made me surprised as I was waiting for him to choose Real Madrid. But you might be right about the thing that Real Madrid can still sign him anyway next season or after that. It is obvious that Real Madrid want to see him in the squad in the long term. They would be ready to spend more money for him too then I guess. Because they might need to pay a transfer fee too as they missed this chance.