According to @KobeissiLetter, Elon Musk has disclosed a new $1 billion purchase of Tesla stock, pushing TSLA up over 8% and back above $425 per share for the first time since January on Sep 15, 2025 (source: The Kobeissi Letter post on X, Sep 15, 2025). The same source reports the disclosure and the immediate price reaction; no direct crypto market impact was cited (source: The Kobeissi Letter post on X, Sep 15, 2025).