Prepare readers for unforeseen circumstances and teach them survival knowledge. Start a blog that shares survival tips, techniques, and survival gear reviews and recommendations. There is a wide range of scenarios you can cover: wilderness survival, emergency preparedness, natural disasters, as well as urban survival strategies. And do you know how much paranoia is there around the end of the world? A lot of people and blogs made millions during the years leading up to 2012.
Back to the topic: You can provide step-by-step guides, survival kit suggestions (and affiliate links), and articles on skills like navigation, making fire, and first aid. You may want to make this more interesting by adding real-life survival stories and interviews with experts in the field.
Blog Name Idea: UltimateSurvivalTactics.com