Starting an online business with 10k$ can open up a variety of profitable avenues. E-commerce dropshipping is a popular option, where you sell products directly from manufacturers without the need for inventory. Another great choice is affiliate marketing, where you earn through promoting other company's products. Blogging or vlogging on a specific niche can also bring in substantial revenue if you're passionate about a topic. Lastly, offering freelance services based on your skills, like writing or graphic design, can be a smart initial investment.