That could be faulty math that empties your bank accounts over time. Lose a client? Simple, right? Take your niche sheet and rank them from most to least important to you.
Step into my wayback machine and read all about it. But while luck does play a part in the process, mathematics plays a much bigger part. This may take a few weeks or months to begin to work itself out as predictable.
But even with just a general idea you can begin to guarantee yourself and income, and grow it, as you see fit.