Self-described “long-term optimist” Elon Musk made another bold prediction about his car company. That isn’t necessarily good news for Tesla’s stock price—although investors initially appeared enthusiastic.

Ross Gerber, a longtime Tesla shareholder, outlined to BI four reasons he thinks the stock is vulnerable to a 50% pullback this year.

Elon Musk’s car company is required each year to report to investors all the bad things that could happen to it, and the latest version lists every imaginable threat from costly lawsuits to