IMO Messi case is different than other players because he already have every mayor trophy out there so for him close to the end of his career truly could be all about $$$, I wouldn't be mad if he goes to Arabia just for the $$$ too, he deserves it but if he goes back to Argentina or Barcelona thats something fans will remember for ever, more than if he becomes the highest payed player
Same here, there is nothing left for him to prove in football but I will be happy if he comes back to Barcelona, he needs a proper sent off like a true legend of the club.