I haven’t heard any rumour of this happening. It would help if you added a links to articles where it was published. Still, I wouldn’t put it past the Saudis government, they are very prudent with money. In the last few years, they have invested heavily in sports - football and boxing. And have brought major attractions to their country. The only challenge I can think of is their religious belief, I read somewhere that it’s frowned upon for a Muslim to own Bitcoin.
I agree with you here because I haven't heard any rumors about Bitcoin in Saudi. But the OP should have registered the link here. Because the op may have seen it somewhere which is why it said that. Yes it is true that the Saudi government is very prudent with money because they have spent a lot of money on football and boxing in the past few years. The amount of money they spent on buying various stars created a stir all over the world. But in this case I am not making any theory that they can definitely buy bitcoins if they want to. But if they are really buying Bitcoin we will definitely see it in the press very soon.