To be completely honest - even though I believe he has huge potential - I feel like buying him was way more risky than getting someone like Coutinho, Mbappe or others. With them, I'm super confident that they will become world class (they probably are already), but for some reason with Dembele there's still some part of me that is scared that he won't fulfill his potential. I'm not even sure why, maybe it's because it looks like he doesn't have the same footballing intelligence Coutinho or Mbappe have.
Hoping for the best though!
EDIT: I wanna stress that I do believe he'll become a world class player, but seeing as he cost us 150M, it stresses me out that he might not.