In my opinion, Osimhen will relatively stay with Napoli because so far no team is really serious about signing him other than just saying they are interested. Napoli will have to keep their star players with them for next season if they want to strengthen themselves as the strongest team in Serie A next season.
If Napoli are after financial gain, they’ll be willing to sell Osimhen this transfer window but if they are after the strength of the team and for a possible league title win again, they won’t want Osimehn to leave the club now. We know they’re big team putting an eye on him, but he needs to show more consistency in his football to be able to raise his profile more in other clubs and Napoli will also earn a lot from that.
To be honest If osimhen wants to chase money then he joins Saudi Arabia league Team in this Transfer market. I think that Osimhen will not do this because given his young age, of course he wants to win many trophies in prestigious leagues in Europe. Apart from that, the big European teams that are able to bring in Osimhen are most likely Real Madrid and PSG.
We can’t tell whether he’ll want to join Saudi side or not when there’s an offer for him. But I’m very sure they will be up for him if there’s a chance he wants to leave the club. What I’ve noticed with the Saudi sides is that, they mostly go for players that have already some titles to their names and played well in Europe rather than going for upcoming and current young players.