Investors are questioning the tech billionaire's involvement in Trump's administration, while shares in his Tesla electric-car company plummet.

Following Trump's win in November, Tesla stock surged to a new high of $479 per share on December 17. Now, just three months later, the electric vehicle titan's stock has plummeted 51% from its peak, down to $234 per share at the time of writing.

Elon Musk 's net worth has dropped by more than $144 billion since December, according to a report.