That said, the second sentence in this statement is false:
"First, if you have investors, you are working for them. They are providing the capital for your business and you have a fiduciary responsibility to return their investment with profit."
Yes, you have a responsibility to investors to do everything reasonable to give them a return on investment, but the type of investment may or may not create a fiduciary relationship. And it's important not to be glib about what fiduciary duties actually are and when they arise.