I certainly don't think staying in a great job is a bad decision at all, but I did want to just mention something that your comment brought to mind. A lot of people appear to think that in order to start a (good) startup, you need to solve a problem that hasn't been solved before. I would argue that it's often much easier, and potentially just as lucrative, to solve a problem better than it has been solved before. Thinking of a really meaningful product that no one else makes is hard. But imagining how to do something that's already done, but do it better? That's much more do-able, and could still have a significant impact.

So, I'm not pushing you to start a company at all. But if you do, don't limit yourself to "unsolved" problems!