Tenfold, you say?
Juve sold half of him for 3m, I think.
So he was worth 6m then.
So he's worth ten times that now?
But people thought Juve gave him away too cheaply back then, so he must be worth even more than 60m now.
How would signing a 26 year old defender from Brazil compare to signing a 25 year old defender from Brazil who had already failed to make an impression in Europe and returned to Brazil?
Why is his age and playing in Brazil relevant?
If you haven't watched him, don't speculate about his ability.
I haven't watched him play, so I'm not in a position to comment on whether he would be a good signing.