Good-Person
Captain Junkie
Owning a blog can help you earn while you're sleeping. You need to work so your blog is rich in traffic, then earn through ads, and selling of affiliate products, and other stuffs.
Well, owning a blog is a good way to earn. However, it would require you a lot of time to manage it and upload high-quality content, so I would not call it an "earn money" while you sleep because it does consume a lot of time and effort during your day time. on the other hand, mining coins does not consume much time and all you have to do is manage PCs and hardware, so mining is a much better "earn money while you sleep" business.