Ok, sorry for that but even after you get burnt look for a fireproof Stock and invest there for long term return.
Or investing in outside stock is business.
1. Open an M-Pesa outlet this happens to have nice returns with time.
2. Open a small shop selling original phones but those which are pocket friendly for the over 3.5Million fake phones holders who are going to be switted off, the akina "Mark Juma Mtambo"
3.If you know people who own houses and you are in good terms with them over trustworthiness then don't hesitate to open a Rent collection agency by employing some of you friends or relative.
I hope this will help you,but if you have anything in mind then share it with us for advice.
take care.
Sound that I love most: Is the ringing bell of Stock Market.