Every player wants to join a strong and good team so it's only natural that some players decide to move from Chelsea.
After all he is also one of the good players having made it to the Brazilian national team but at almost 39 years of age he has thoughts of joining Fluminense which has made him a great football player.
Chelsea's new manager will have to decide if he'll be in his plan for the club next season but even if Silva won't be in his plan, Thiago Silva should look for another European club and play for
But if the rumors are true, he will leave Chelsea, it is unlikely that he will play in Europe, even if only for one season, due to the decision to move to the old team, which made him a talented football player the right choice.
Apart from that, Thiago Silva can also play in his retirement later in a team that has succeeded in making him the great player he is now.
The decision from the Chelsea manager hasn't been made yet, so we'll have to wait and see what kind of decision the manager will make.
I have to say that if they could have gotten a 25 year old (age is just example, I mean much younger) that is better than him then we wouldn't even know if he was still good or not. The only reason why we even know that he is still good at this age is because the team makes him play, because they have no better alternatives right now. That's a shame and one of the main problems, spending a lot of money means nothing if you do not have a proof of success thanks to that.