Tesla (TSLA.US) 's longtime shareholder and prominent investor Ross Gerber said his fund has significantly slashed its stake in Tesla since November 2023, following the erratic behaviour of Tesla CEO Elon Musk on social media, controversial changes to the social media platform X, and political controversy. Currently, Gerber still holds US$60 million worth of Tesla shares, but he has made it clear that he will liquidate his position if Tesla fails to improve its performance within six months.Gerber also added that Tesla's current valuation is too high and cast doubt on Tesla's future performance, suggesting that Tesla could fall another 15%. He did not rule out the possibility that other EV companies such as Rivian (RIVN.US) could become the next Tesla if they can scale up production and reduce prices.(Real-time Streaming US Stocks Quote; Except All OTC quotes are at least 15 minutes delayed.)Related NewsFed's Kugler Sees Further Rate Cuts Appropriate if Inflation Continues to Ease