By Luc Olinga Tesla CEO has promised to release a humanoid robot in September and to market it in 2023. Elon Musk is charismatic but also whimsical. Sometimes it’s hard to know if Tesla’s (TSLA) – Get Tesla Inc. Report chief executive officer is serious when he makes ostentatious claims and thunderous statements on Twitter, his favorite communication channel where he has more than 101.6 million followers as of time of writing. Is he provocative or simply ambitious when he announces that humans will be living and self-sufficient on Mars twenty to thirty years from now? “20 to 30 years from firs…