If the reward is much better then the risk then I would go for it so long as what you risk is not too much of your capital unless it is a good solid longterm investment that is over 10 years old and well established.
Investments into bitcoins on the other hand seems the best way for making profit from a small amount, with comparatively less levels of calculated risks.
Bitcoin is at same time risk but very profitable. And the good thing here is that even being risk, it's not so risk like another things people lose moeny everytime, like the trade, ponzies, gambling. It's true bitcoin is related to all these stuff, but it's not necessary to join one of those stuff to use bitcoins. You can hold your bitcoins (low risk) and you are already earning money.