It should be a nice to make a login option when any authorized user will be able to add his own categories.
i don't think that option needed for his website because it's very easy for you/user to change the categories that you want read
Try to add Russian language, it has quite a big crypto community.
Mm what`s with mobile version ? It shows only ONE post on the main page for today.
maybe add another language into his website is another good option to bring visitor into his website
but for me i think add the latest news as possible because every time i visit the website and the news always shown 8/9 hours ago