Basicly, this is the main question. For now I've chosen a hobby and right now collecting any good info about it. Main idea came up from this thread:https://www.blackhatworld.com/seo/would-you-buy-this-expired-domain.1157337/#post-12411251 But now I'm not so sure, if that was such a good idea. After I checked several low competitive keywords there were no clear answer on some questions. But there some sites with really high DA and pretty old domains. So what should I do? Should I keep searching for low competitive niches or just keep updating blog, creating backlinks etc? What would you suggest?