I don't know if Neymar is really still competitive for the Champions League title with PSG. But even if he is he can't even last for a season without a serious injury. Therefore it is difficult for him to be a part of this by being in action. He is getting injured very often as we have said before. Otherwise he is definitely a world star and in the time he was able to play his statistics were really good this season.
If there is really an offer from outside Europe then he should take it and go. He can make much more money in the meantime and return after some time if he would like. But now I think it will not be easy for Neymar to find a European team that would be eager to satisfy his high demands.
That is the pro and the contra about Neymar. When he is healthy he can be a decisive player and his actions are on a level that is rarely to be seen. But as soon as he gets injured he will leave a gap that is then hard to close with another player. But he is also not the strongest player in terms of mentality as he freaks out quickly and loses concentration and discipline as soon as a game isn't going as he wishes. He is not the player who is willing to fight for success and to suffer for it. He rather wants to be looking great and complain when things go wrong.