Sales of Tesla cars have nosedived across some of the EV manufacturer’s most valuable European markets—and experts are blaming Elon Musk. Sales in Germany, where Tesla has a factory, dropped a staggering 59 percent in January compared to the same month last year,

Shares of electronic-vehicle maker Tesla fell more than those of GM and Ford, despite less exposure to impacts from potential tariffs on Canada and Mexico.

Tesla CEO Elon Musk has a history of making bold predictions. In the latest earnings call, he said Tesla could reach a market cap of $15 trillion or more. Autonomy is the key to getting there. Musk, who also runs SpaceX and a number of other companies,