Musk is still more than $80 billion richer than he was on Election Day, even as Tesla’s more than 90% post-election rally shriveled to a 10% gain.

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. On Saturday, Musk tweeted that Tesla’s earnings could grow tenfold over the coming five years if its business execution is “outstanding.