I guess selling Yamal will really change their financial record for the better but is it worth it. To be frank if barca sells Yamal now or clear their financial debt they won`t bbe able to compete against Real Madrid this season but one thing is sure is that they can still make it to top 4 even without spending too much because if they could do it last season with Xavi where majority of their key players where injured then they will even do it this year though they have to prioritize getting more players to shuffle their squad in order to avoid injuries from over stressing players, than getting players who will cost a lot.
Looking at Barcelona's record in transfers, there are actually many opportunities for them to change their financial condition, such as when last season the interest in Gavi and De Jong was very large, which would definitely make them profitable if they released these players but in the end they stayed because Barcelona knew that when they released their core players to leave, the club's condition was difficult to stabilize.
But that was the situation in the past where Xavi was in charge and it will definitely be different with Flick. It's just that on the one hand to now let go of Lamine Yamal is very risky for a decline in performance.
Currently, Lamine Yamal's performance is still very good and he is one of the players who can bring Barcelona out of their slump but with the difficult conditions in terms of finance, everything can still happen. So surely with this they will take actions that they think are not too detrimental both in terms of performance and in terms of the finances they are currently facing.