Really much ado about nothing. Mediots need to get clicks/sell papers when nothing is going on. It was also said we will listen to offers above 30m which is not the same as saying we will actually sell Casado for that price. We should listen to offers to all the players in current squad except Lamine and Pedri. Everyone has his price.
I kind of agree with
@serghei though that Casado is currently more around a 40m (than a 60-70m figure I've seen) player on the market and more valuable to us than other teams. And that's fair valuation because he's not exactly seen as a starter in Flick's eyes. Bernal started ahead of him last season before getting injured and Frenkie then got his spot when he got back to full fitness and form.
Don't expect any midfielder to leave this summer. Having depth is useful (especially considering they all have/had injury history) and not often we can say that about any position. And I'm not sure selling Casado would allow us to sign a quality defender. Thebes would surely find a way to prevent that. So better to keep what we have.
That said within next 12-24 months one of the midfielders will very likely leave to finance a striker signing. But when that will happen we should sell from a position of strength (probably for the first time ever), not just of the players currently in the first team but also upcoming youngsters who could eventually push some of the current first teamers out in coming years. So when the club will decide to sell (whichever player it will be) it should be under our conditions. No more lowballing offers and selling players far below their value because we want to get rid off them.