Group 1 - Tesla stock has seen significant gains, with shares jumping 6% recently, following a large stock purchase by CEO Elon Musk [1][5] - Musk's recent purchase of 2.57 million shares for approximately $1 billion marks his largest stock purchase in over five years, with prices ranging from $372 to $396 per share [4][8] - Musk believes that 80% of Tesla's future value will come from its Optimus humanoid robot, despite current challenges in electric vehicle sales [3][6] Group 2 - Investor excitement is building as Tesla prepares to launch fully self-driving technology and a robotaxi fleet, contributing to a 25% increase in stock value over the past month [5][6] - Musk's confidence in Tesla's future is influencing other investors, leading to increased buying activity in Tesla shares [6][8]