Just stay away from ponzi scheme or something like that, you might build your own business, or investing on trusted scheme like gambling investment, lending company or some kind of that, you must check the reputable of the company first due to the so many scam site out there,
i hope you find your way
The important thing is the secure of the investment. I agree with you. After that, check the company have potential to give profit or not.. Although it secure but also must profitable.