Mbappe is not overrated, I don't see many saying he is on CR/Messi-level for example.
Who knows if he will be more determined and tenacious when/if he joins Real and wants that CL-glory?
For all we know he is a stat-padder as well (notorious CR-trait), being pissed losing golden shoe to the goat and counting all his goal in training etc.
Florentino usually gets what he wants, and Mbappe is Reals project "rebuild" (ours is Lautaro, lol).
There is more chance that PSG don't win CL this and next year than they do, and this will tilt Mbappe towards leaving.
Of course every other team like Liverpool and us should do everything to land him, but in our case our finances are shit because of our recent transfers and our wage-policy the last 5 years.