How to protect against fakes?
Basically do your own research.
If some tell that Elon Musk buys Ethereum, see on his public statements about it. Search on twitter (but make sure you didn't find fake accunts with that name), search on blogs, search on reputable news agencies.
If somebody tells that certain bank or institution plans certain service, check that bank's pages, social media or even ask their support.
..Something like this.
Especially if you want to invest based on certain news, you have spend some time and effort to make sure everything is all right.
That's right. To be on the top of latest news you should to follow many powerful people from the industry on Twitter, such as Musk or Buffet. Add to that try to think your own head and calculate for possible event in crypto world. Everyone who wish to stay away from scamming and FUD news should to learn a bit about the subject, it's like must have.