In the 2022 Q3 earnings call, Elon said that he see's a potential path for Tesla to eventually be worth the current value of Apple and Saudi Aramco combined. The two companies are currently valued at $2.3T and $2.1T, putting the combined value at $4.4 trillion, implying a stock price of $1,418. Later in the call, Elon corrected himself by saying his valuation does not take into account the Optimus bot, implying it could be much higher once Optimus comes to fruition. While Elon did not specify a timeline for his prediction, the fact that the valuation does not include Optimus implies to me that that he's thinking of a time horizon before Optimus reaches mass production, which Elon indicated would be about 3 - 5 years from now at AI Day 2, meaning we could see a stock price in the $1,400s in 3 - 5 years.