I am dividing the investments into categories in order of risk.
Low Risk - Here you won't lose the money but can't earn much
High Risk - The chances of earning are small, but you can earn a lot
Since 1000$ is a small amount (according to me) I guess you're interested in something with higher risk.
There is a process of evaluating the investment ideas. Make a list and make analysis, we're interested in science, right?
There are terms like net present value, qualitative and quantitative analysis... You'll understand the huge difference between an investment in gold, shares of a company, bitcoin...
Start a simple SWOT of the final ideas