Starting a traditional business with just $100 can be challenging, especially with upfront costs like inventory, equipment, or a physical location. However, there are low-cost business ideas you can consider, such as:

Online services: Offer your skills or services online, such as freelance writing, graphic design, social media management, or virtual assistance. Sign up for free on freelance websites like Upwork, Fiverr, or Freelancer, and offer your services to clients worldwide.

Dropshipping: Start a dropshipping store using platforms like Shopify, WooCommerce, or BigCommerce, and invest your $100 in marketing and advertising. You don’t need to keep any inventory, as the supplier handles fulfillment and shipping.

Affiliate marketing: Join affiliate programs of companies that align with your interests and start promoting their products using social media, email marketing, or a blog. Earn a commission for each sale you refer.

Tutoring: Offer tutoring services to students online or in your local area if you have expertise in a particular subject or skill. Conduct your classes using online platforms like Zoom, Skype, or Google Meet.

Starting a business takes hard work, dedication, and a willingness to learn and adapt. You may not double your money overnight with $100, but with the right strategy and persistence, you can build a successful business over time.