I feel pulled two ways on this one. Yes, 'fake news' is all over social media, the media, day to day conversation these days (even in Canada!). So on that base I can see it worth a lot, as numerous others have suggested.
However, I then asked myself the question I always ask when considering any domain name: 'What kind of company or organization would want to buy it and use it?' Who wants to call themselves FakeNews. The only realistic thing I could think of would be some sort of comedy or parody site. Maybe I am just not creative enough to think of realistic possibilities.
Certainly if I owned this domain name and had a reasonable offer I would take it and run (and after running invest it in other domain names!
Just my (inflating my worth
) two cents worth!
Bob