he is saving his entire neighborhood with this deal, its life changing money not only for him but for his entire fam... if i was on his position, and football is not my passion (like seems to be the case with a lot of players, icardi for example) i would take the deal without a shadow of a doubt.
Conca was a world class prospect, he choosed to play in China for the money, because he hated elite training and preparation, he is a legend in brazil and he made Messi type of money on china.
Conca was the difference in that Fluminense team.
This is so, so, so much money. It's ridiculous. He doesn't even need to play the full contract. He'll soon follow Ramires (who's being loaned to Cruzeiro) back to Brasil. He's financially set for life.
The other side of the coin is that he was already financially set and could well be playing in a team like Juve (who've courted him). If his goal is to make money and then come back to Europe, he's not doing it in the best way.