I found another solution how you can avoid to see this kind of comments on every post on some famous crypto facebook pages/accounts.

If you will look on the comments, you can see a drop down, which will sort the comments, based on Most relevant, Newest, All comments.

By default, it is set by Most Relevant, but this can be effective if there are already a lot of comments, because it will just sort and avoid some spam/scam comments. Check the screenshot I uploaded below for more information about this feature on the comment section of every posts.

Again, it is still the best to report the posts if you encounter these kinds of comment/posts.