Aubameyang seems to be one of the most favoured players this year, moving from one top team to another is really wonderful especially at this stage of his career. A move to PSG seems unlikely though but it will be another stepping stone to his career if this move is realistic. I think he is settling well at Stanford bridge and a move at the moment doesn't look like an option for Aubameyang.
To get a future or a bigger salary that might happen, but if you say for career advancement of course often changing clubs is not a solution in my opinion, now Aubameyang age is no longer young and during his career he has not received a single trophy which is quite prestigious like the UCL trophy and if he continues to change clubs in a short time of course there is no guarantee that if he retires later there will be a prestigious trophy that he should be proud of.
A player moving from one club to another is not a sign that the player is lucky for that season, it could mean that he is not acceptable in a particular club so he has to move to another club. It could also be that he is not fit into the pattern of a particular Club.
If I were to be Aubameyang, I will remain in Chelsea for at least two to three seasons before going to another club. This is important, so that when he retires, a particular club can call him their legend.