This would be a really profitable deal indeed however it is bad in some other way for Napoli. Because they are likely to lose a lot of power by this summer. You know that Kvaratskhelia and Osimhen are both rumoured to leave the club for a huge amount of money in total in this summer. They both have impressed many big clubs and no doubt there would be many in line to sign him. Especially Osimhen seems very likely to leave as long as he gets a reasonable offer from a big club competing in the Champions League.
If they lose important players in defense and offense both we might see a different Napoli next season. Because of that the current season is like a dream coming true for them. Maybe they won't get a similar one so they had better enjoy the every moment.

If it is possible and hope that the conditions will return to the same as this season as much as possible they don't lose players in the transfer later.
The loss of several players in several sectors such as the current rumors about Kvaratskhelia, Osimhen and now Kim Min Jae will obviously be a frightening specter for Napoli, especially since the three of them are one of the pillars that have succeeded in bringing Napoli to what it is now.
But if indeed what you are after is money after winning the championship this season, it can be done, it's just that this will clearly make them different next season.
You are right. that Inter Milan also looks like they will win the title in the Coppa Italia. because after all Fiorentina is not a team that can trouble Inter Milan. But we don't know what will happen in the final. but what is certain is that we all definitely favor Inter Milan. and yeah Inter Milan also has the potential to advance to the final in the Champions League if they manage to beat AC Milan. but maybe the match against AC milan will be much more difficult for Inter Milan.
Fiorentina is still quite troublesome only in terms of quality, currently Inter is better.
The last time they met Inter also lost earlier this month to Fiorentina so it will still be a little difficult if they want to win the final because it will also be very tough. But about Fiorentina they still have to go through tomorrow's game even though on aggregate they are very good and their opponents probably won't be able to catch up but anything is possible still can happen so if Fiorentina wants to be in the final as much as possible they don't lose tomorrow's match.