Nobody really believes Vinicius is going to Saudi league at this age, do you? I mean that would be possible if he reaches like 30+ years old, because lets face it he is fast, but he will not stay fast forever, so when he gets older and slower, he may go there, and with his name, he will definitely make a lot of money from fame, if Saudis are still doing that kind of thing. But at the moment? When he is at the top of his game?
I do not think that would be possible at all, it feels like it is not going to end up that great. We should realize that these are just rumours, clickbaits, to get more people to talk about it, so that it would generate income for these places that spread these rumours. He is staying at Europe for many years before he considers that.
Even if Vinicius reaches 30+ in age, is it necessary that any player that is getting old should join the Saudi League and probably end their career over there?. Vinicius is a name that commands respect in football so any news that relates to him having an intention of moving to the Saudi League is a false and a baseless news because Vinicius alone cannot even think of leaving a high profile team like Real Madrid to join the Saudi League just because of how much they can pay him over there. Even if he want to move out of Real Madrid, he will rather choose top European teams. These players has already made good amount of money for themselves so we should not make it look like all of them are hungry of the huge amount they stand to earn in the Saudi League. Lionel Messi is a big name but even at his age, did he join the Saudi League? NO.
It's not all that baseless. When players like Ronaldo and Mané go there, what is the reason that it is baseless to believe a rumor that Vinicius Junior could consider going to the Saudi Professional League? There have been several players wasting their careers, throwing their morals over board (Henderson for example), and doing other things to make more money.
Not everyone is like Messi who refuses money and chooses satisfaction and comfortability and values over money. Ronaldo is a greedy kid who would go anywhere for money. You could send him to Mars for a billion and he would play football there on his own.
The character traits that Vinicius Junior has shown so far do not speak in favor of him. He has no morals and no respect for others. I wouldn't be surprised ever if he went to Saudi Arabia for the money. He didn't even attend the Ballon d'Or to congratulate his colleague Rodri from Manchester City for the impressive win of that award. That's his character. Instead he boycotted the event, what a stupid kid without values.