Depending on your experience and knowledge, you might be interested in recovering and/or refining of precious metals. You can do so even from e-waste.
I started my business, recovering, refining, assaying etc with no prior knowledge of chemistry, I had to learn everything from books, self taught. If you already have a chemistry background and feel comfortable (or at least as much as could be) handling very strong acidic solutions, you might find it very interesting, and if done correctly you could make some money doing so.
You could start with silver which is fairly inexpensive in comparison to other noble metals, learn how to dissolve silver, precipitate it, melt it into anode bars then you could use an electrolytic cell to further refine, and in the process you could produce some beautiful silver crystals. You could even take this hobby a little further with silver, and find a way to produce thick silver crystals that could be used in the jewelry trade.
It's not for everyone, and it's by no means simple and easy. You would have a lot of reading to do on the processes and techniques, some of which would also include subjects on different types of metallurgy, but you would already be ahead of the game with your knowledge in chemistry.