Blogging is a very good and lucrative online money job if you know the nooks and crannies of it.
It is very important for you to carefully select the niche to specialize on, you ensure you have knowledge about it and passionate about the niche though lots of the niche have flooded the internet but your style of writing and traffic sources will be keep you strong in the competitive nature of blogging especially when you want to earn from it.
There are niches like Crypto currencies, making money online, mobile games, healthfitness, herb medication, kiddies, love, marriage, relationship and lots more.
It is also very important that the theme of your blog should have a reflection of your niche, if you blog on on love or relationship, it is advisable to go for theme with blueish background and not a dark theme.