Making a couple of dollars online through survey sites, micro job platforms, GPT sites, PTP forums is achievable without investment and without major skills. However, for a moderate earning like making $20-$30 every day requires you to have professional skills that you can use freelancing sites to secure jobs. If you want to make substantial income like $50-$100 per day, you might have to make an investment to build your own projects like a blog, online store, etc.