I wouldn't be surprised at all if Kylian Mbappe extends his contract with PSG again. And that's what we've seen in the last few seasons as well. But if Kylian Mbappe wants to win the Champions League or the Ballon d'Or, he will definitely have to leave PSG. Because while PSG has plenty of money, they have repeatedly failed to build a stable squad. And so Liverpool or Real Madrid would be good choices for Kylian Mbappe. Liverpool will be stronger if Kylian Mbappe joins Liverpool. And Liverpool's chances of winning the Premier League will also increase.
If Mbappe extends his contract with PSG again, then this will all turn into a farce. It seems to me that even the PSG fans are already tired of his inconstancy and although he is “their guy”, unlike Messi, everything can end up being booed too. After Mbappe voiced his desire not to renew the contract, in my opinion there is no turning back.
Mbappe will be bored in PSG because he has made up his mind to leave the club. His inconsistency might be that he is tired with the club and needs a change. I believe that he will not renew is contract with PSG. If Liverpool can be serious with the deal then he will add great impact to the club and Liverpool will be outstanding.
On the other hand, if Mpabbe join them in Real Madrid,it will be that Madrid dreams has come true and he will explore the Spanish league next season.