I have had co-founders on businesses and none of them ever worked out. It might just be me, but I have a hard time being motivated to really go through the hard stuff if I think someone else is a backstop or will do it for me.

My business that I started and built entirely alone is by far and away the most successful one and has made me a multimillionaire.

Whenever anyone asks me, I always recommend people to start a business on their own and just grind it out.