The next five minute star. He'll be the next Brazilian to head back to his homeland after a few seasons in Europe, regardless to which club he ends up at. Hoping it is not us that spunks the money away on this one.
The way I see it, most of the Brazilian young stars are snatched to Europe at a relatively young age. That's one factor, which might actually affect their behaviour one way or the other. If given a few more years at their clubs to gradually mature and get their head screwed right, such problems might be less likely to occur.
At the end of it, they're just kids. Instant fame (interest from top clubs) and better salaries are not necessarily the exactly doing them much of a favour in that regard either. The clubs are unfortunately part of the problem as well. With them craving for instant success and having one over their rivals, they tend to spend crazy money for such talented youngsters, which might not at the end of it receive proper nurturing.
Not saying this happens to every young Brazilian (since we're talking about those) but the risk is quite evidently there. More often than not, the end result has not been the desired one.