Key Points Elon Musk is putting his money where his mouth is. His $1 billion Tesla stock purchase is his largest ever by value. Tesla is preparing to launch a robotaxi fleet, and Musk sees huge potential for the Optimus humanoid robot. These 10 stocks could mint the next wave of millionaires › Tesla (NASDAQ: TSLA) stock has been on fire. CEO Elon Musk must think it has plenty more room to run, though. After Musk revealed a large Tesla stock purchase, other investors are joining the party. Shares ...