Sometimes, creating a new interest blog is better than updating your blog. But now, I think you can create multiple blog in one account. All you have to do is just add a new one that is interest by many, and once it hits your reach visitors goal, update it every now and then, Try to communicate with readers if they ask a questions. It takes a long time to build your own blogs and it takes longer to succeed. Sometimes, if you lucky enough, you can have lots of visitors in your site.I have blog about baking, I rarely update it actually. And in terms of visitors it's not that a lot. So i decided to leave for a moment and just add new updates soon enough if I have interesting food recipe on it. So, in conclusion, weather you keep update your old blog or create a new one, communicate with your audience.