I may want to revisit SpaceX later, when it's cheaper and looking in better financial shape. But right now, MercadoLibre (MELI +3.59%) and On Holding (ONON +1.42%) look like much better growth stocks. Here's why. 1. MercadoLibre Everyone is talking about Space Exploration Technologies (SPCX +0.13%), commonly known as SpaceX. With Elon Musk at its helm, it gets a lot of attention. That's part of why it easily raised $86 billion in its historic initial public offering, which was oversubscribed by more than fo ...