Trying to strike a balance between growth and stability is tough. On the one hand, you could stack too much cash into speculative stocks with near-term promises that fizzle into nothing when the rubber meets the road, such as Virgin Galactic (NYSE:SPCE). On the other hand, go for too stable a selection, and you end up collecting a measly income from dividends with limited capital appreciation upside, like if you invest most of your excess cash into something such as Realty Income (NYSE:O).But there’s a way ...