It was always expected that Kolo Muani would leave, he was just way too good for a team like that and he would be able to go play at any team he wants. All the teams in the world would want him, some of them are willing to pay for him as well.
Let's see which team he picks but looks like it's a done deal that he will leave, that much is guaranteed. Inflation really showed itself on football as well, back in the day anything close to 100 million was reserved for worldstar players, like the best of the best, Ronaldo type of players. Nowadays you get to see maybe at least 50 players that worth near that amount, even if not exactly that much, close to that. Kolo Muani is one of those players, apparently worth 80 million euro right now.
Even if he is worth €80 million right now, I don’t think they are actually going to let him go for only 80 million. There are at least trying to get 100 million for him. He is absolutely way too good for the team. I actually wouldn't be surprised if he does make a number like 100 million euro. I also agree that this number has become a little worthless in recent times. Thanks to the inflation for that, everything cost twice as much now. Of course, that is not a problem. The players can be worth a lot of money. But it just feels like the time is changing a little too fast.
Therefore, it looks like Eintracht Frankfurt is a very lucky club to have Kolo Muani for free from FC Nantes in the transfer window last season. But yes, with Kolo Muani's success last season, then of course Kolo Muani deserves to play at a better club for next season. Although indeed, it might also be a loss for Eintracht Frankfurt's performance next season if Kolo Muani leaves at this moment, but if Eintracht Frankfurt is willing to sell it at a high price then of course it will be a very good advantage.
After all, Kolo Muani has very good potential over time because of his young age too, so big clubs can recruit Kolo Muani for long-term progress of course. But if Kolo Muani stays at Eintracht Frankfurt maybe for one more season too, it seems like it would still be fine but of course it would be a pity if his performance declines maybe if something happens like an injury or something else.