If you had world.news or breaking.news or something with a direct high traffic keyword then it could be a mid five figure to a low six figure name
21stCentury.news though - you have two numbers and 9 letters, 11 characters not including the extension .news which has a low popularity among GTLD extensions
honestly this is not the name to buy; appraisal value - registration fee
Thanks for your appraisal, with all due respect, I believe that your analysis is only based on basic rules, such as numbers, characters, etc. But we must also take into account the meaning of the numbers, their characters and their extension, together it can form something understandable.
On the other hand, a new domain that is used on a web page can have good traffic, if it is invested in SEO and / or SEM
For example, 21st Century Fox was an American multinational corporation, as well as several on the Internet, but my domain fits perfectly with 21st Century News that can be used for a newspaper, radio and television channel, or simply independent journalists.
I am very sure that one day, some major US or Europe corporation will be very interested in this domain. Because it has an important meaning for all kinds of 21st Century News
I will also publish in NamePros the sale price of the domain 21stcetury.news and you will remember what I said: "That the rules do not always value a name and/or domain extension, a good website generates organic traffic more than all the rules, that the majorities are absurd or maybe demoralizing
Greetings