Investors must decide whether this is a buying opportunity or a time to sell Tesla stock.

Fundamentals over hype. Indeed that’s the lesson for Tesla (TSLA) investors after the EV maker’s disappointing robotaxi event last week exposed a disconnect between the stock’s lofty valuation and reality.

Musk, who speculates Optimus will eventually become Tesla’s primary revenue source, stationed the robots throughout the event so they could demonstrate their ability to serve drinks, dance and mingle with guests – though seemingly in controlled environments and with a high level of human supervision.