I always say that what matters is what is convenient for someone to do when it comes to working online and try and as much as the person can to focus on it very well.I prefer to work on 1 website to earn a dollar instead of working on 4 different websites. It isn't just a matter of convenience. Joining multiple earning sites and working on them on a daily basis could be too draining and stressful, especially if you are only working online as a side hustle.