Adding some high-risk, high-potential stocks can sometimes pay off big.If you're looking for some potential millionaire-making stocks, be prepared for the fact that you're going to have to swing for the fences when making your choice and hope you connect with the right pitch. While there are a lot of great megacap stocks out there, some of the easier pitches may not have the return potential you're looking for.Let's look at three high-risk, high-potential-reward growth stocks that could be worth taking a sw ...