it's actually a good time to sell him to PSG for 100M + .
Let's admit it. With his technical skills level, this is his prime time and he has achieved his potential ceiling. with that, he is still performing very inconsistent and you can't really rely on him as the core to win back the title. He could be just one injury away to go back to ground zero of his form like last season, or fade away like Sterling slowly when his physicals degraded.
Similar style but better technical wise, Gakpo would be a good replacement with lower price and higher ceiling of potential.