Losing De Jong will not do Barcelona any good, if we look at De Jong this season his performance has declined slightly and it is possible that other clubs who want to take him also don't want to spend more than 100 million, because De Jong is not the best at the moment , selling De Jong will not reduce the players' salaries which is currently a problem at Barcelona, and Barcelona will also bring in a new coach and of course want several new players.
With the performance shown by De Jong, I think he is still worth keeping and also the player's desire to stay at Barcelona is also very high, it is very likely that he will work hard in the Frendly Match to impress the new coach who will appear in charge of Barcelona next season.
I agree with you. Even though Barcelona has a serious financial crisis, if they sell De Jong and recruit another player with the same quality or more then they will still have to pay the same salary as De Jong receives. I heard news or rumors that said De Jong would be sold because the club management planned to recruit Bernardo Silva from City. I think De Jong is a good player but unfortunately he often suffers from injuries so his performance is not optimal. This is similar to Dembele before, where Dembele often suffered injuries at Barcelona but strangely he became a quite strong player at PSG.