If I had two-thousand dollars and I could only invest it, I would probably invest into my own 3D printing business, and get that rolling more. With $2000, I could get a really nice, fast, $1000 3D printer to increase my production twofold, and $1000 worth of filament would last me a really long time. It would probably take me a while to re-gain my capital, but overall I think it would be an investment worthy of putting my money into, and, with both printers, the business would be able to sustain itself for a long period of time.