Key PointsSpaceX has 10,000 Starlink satellites in service.Amazon Leo has only 300, but is already halfway to being able to offer beta service.These 10 stocks could mint the next wave of millionaires › In just a couple of months, SpaceX could finally go public. Investors have been waiting years for a chance to own a piece of Elon Musk's famed space company. At one point, we thought we'd have to settle for owning SpaceX's Starlink subsidiary alon…