Very few 'elite' players start and finish their careers at one club. From the club's view-point a player has a peak selling price after which his value drops and it could be that Messi has already passed that point. Add to that the tax regime in Spain, the new kid on the block that is Neymar, and the situation is totally different to a couple of seasons ago.
If it does happen, and it could imo, just hope it doesn't involve Kun going the other way.
If it does happen, and it could imo, just hope it doesn't involve Kun going the other way.