Ripping off implies Juve were that adamant at getting him now and it was stipulated in transfer deal must be moved now and they reneged? They prolly fine just signing him for next season. And Atalanta has already transfer loan deal in place, they not ripping anyone off, they just respecting a deal they have in place. Its us, and other clubs, who are adamant to sign him, to get him before others do (everyone could think lets wait til June to get him, but some club might sign him under your nose, like we just did rapidly over christmas), Parma is just a byproduct of it all.
Pricec these days, 30m has become a minimum for decent/good players, especially young ones, especially since he is still a teenager, and can has resale value for days even if it doesnt pan out.
His hype is mainly centered on Italy after half a season. If you wait to June, and he has as impressive 2nd half of the season, if not even better, it can defenitely be way more then 40m. Just look at Luka Jovic in Frankfurt, one good season and he costs 65-70m, Pulisic in Dortmund he was litterally bench player there for that entire season half (he was impressive the season before, but not the one he was bought), and he cost 70m for Chelsea to buy, and they bought him in January and left him there on loan too.