Then what do you want?
You prefer us to sign no one as a protest against that new reality?
Yes, I would not sign anybody, not under these conditions.
I would take the money and work with it in wiser ways than spending it for a random overhyped dude.
I would try to improve the way the scouters (so that you can really find potential top players before they get overhyped by their teams and media) and the whole Barça system works, since the competence of the board has dropped massively recently.
For this season I would just give a chance to Deulofeu: I saw him play for AC Milan and he sure as hell is not worth 10 times less than your random Dembele. I would sign someone who can be useful for our midfield in a wise way, ala Rakitic at "just" 18 millions of 2 years ago (Rakitic who proved instrumental for our recent wins).
But I get it: the board must spend a lot on a supposed "big name" (which to me isn't, but that's another story) otherwise the fans would go apeshit.
Fine, but at least I recall my right to LOL hard and be heavily disgusted each time amounts of money like 120 mlns or 150 mlns are associated to the names of dudes like Coutinho or Dembele.