lets hope they don't have to sell everyone next year , but I fear that is how the Dutch system works .
Obviously they dont sell everyone. Although they do sell some players - De Jong is already gone, not sure whether captain De Ligt follows him to Barca but i'm pretty sure that even he fancies to move forward but as he's just 19 then perhaps he is smart enough to stay for another season or 2.
Also as it looks like Zijech, Neres definitely & Onana and Tagliafico probably are going aswell ...
Tadic, Blind, De Beek - for this trio it's probably 50/50 whether they stay or go.
Btw they don't have money problems although their budget is quite small for top club - below 100 million but still i believe when season started they had like 200m in the bank and considering how succesful they've been so far this season then they've already earned ~ 100m + 86m from De Jong sale. So they definitely can pay decent salary to their top players.
And for every player who leaves i'm pretty sure that they will find replacemebt who isn't worse and is probably even better and that despite the players who cost ~ 40m usually don't want to go to dutch league. Still i believe dutch league record for bought player has been under 17m for Sulejmani for 11 years now so Ajax probably will break that record in the summer.