If osimhen's price is continue to drop, then club will be caring about that. 
In the end, buying lukaku from chelsea is not a bad option, and im sure this can be an opportunity to push osimthen to give more.
Osimhen should be retained instead of selling him at a cheap price, especially if his price decreases because his performance may also appear to have decreased playing with Napoli last season which didn't perform well, although Lukaku, if he can be bought, should be able to partner with Osimhen, it's not bad enough, he might even be able to make a game. can be more interesting and provide color for Napoli next season, Conte should be able to find an alternative for Osimhen, this can at least make him improve his game even better and make his performance also increase and not continue to decline so that it can make his value continue to fall. In the end, buying lukaku from chelsea is not a bad option, and im sure this can be an opportunity to push osimthen to give more. And Conte? About Osimhen, they were as quiet as a church mouse. That really says a lot, man. He is ready to give up the kid and go with the pros. Maybe a short-term win, but where's the long-term plan? Osimhen should be the star player somewhere, not just sitting on the bench in Naples. This is a turning point for Napoli, a turning point. They have to decide whether to use Lukaku to get quick wins or Osimhen to build a dynasty. They can make their choice, but they should not mess this up