Want to earn a passive income of 1000 dollars a month? Here are a few ideas you can try:

The most straightforward way: invest in dividend stocks or REIT funds to let your money work for you. The prerequisite is to have principal; investing $140k at a 9% annual return can yield over $1k a month, but you can start small and gradually accumulate.

Don't have that much capital? Create digital products—eBooks, online courses, template materials, etc. Once done well, they can be sold countless times. Amazon KDP, Udemy, and Etsy are all good platforms. In the early stages, you need to invest effort in marketing, and then you can just relax.

P2P lending and crowdfunding are also options, with annual returns of 5-10%, but the money will be locked.

Other ideas: affiliate marketing, blogging, renting out properties, making YouTube videos, doing email newsletters... These all require time to develop, but the benefit is that some of them need little to no startup capital.

Just a reminder: Passive income can actually be quite tough in the early stages, as it requires time to set up a framework. Also, don't forget about taxes; different types of income have different tax rates.