It's difficult to earn money without any investment, as most legitimate methods of earning require some form of investment, whether it's time, effort, or money. However, here are a few ways you can potentially earn money without any monetary investment in 2023:

Earn money online 0 investment 2023 

1. Online surveys: Many market research companies pay people to take online surveys. While the pay is usually not significant, it can be a good way to earn some extra cash in your spare time

2. Freelancing: If you have a skill or talent, you can offer your services as a freelancer on platforms like Upwork, Fiverr, or Freelancer. You can offer services like writing, graphic design, video editing, social media management, and more.

3. Affiliate marketing: You can promote other people's products and services through affiliate marketing and earn a commission on every sale that you generate.

4. Content creation: You can create content on platforms like YouTube, or Instagram and earn money through advertising revenue or sponsorships.

It's important to note that while these methods don't require any monetary investment, they do require time and effort on your part. It's also important to be wary of scams that promise easy money without any work or investment.