If your goals are to become the next Mark Zuckerberg, Bill Gates, Larry Page, Steve Jobs, etc., the answer is 'no'.
If you're sick of your current job, want a change, and hate being a subordinate, the answer is 'no'.
So, when is it okay to turn your current life, and risk it all for what seems like a gutshot straight draw? It differs for everyone, but the motivator must be sheer passion for eliciting change and realizing a dream. Moreover, the dream must be for you; it shouldn't be for anyone else. If you're developing a product, develop a product that you yourself would back; if you aren't absolutely, unquestionably committed to your product, then it is my personal guarantee that no one else will be.