Long-term friendships, especially on social media, have ups and downs.
Musk's Friday morning jab at Jim Cramer may have been a jest as they've had a good public connection.
Musk's statement is obscure to laypeople but "inverse Cramer" to the chronically online.
Inverse Cramer advised betting against Jim Cramer's stock choices for the fastest profit.
Cramer's Twitter and CNBC recommendations are shorted by the Inverse Cramer Tracker ETF.
Musk tweeted a birthday emoji to Cramer after pushing the Nasdaq.
CNBC's Jim Cramer has supported Elon Musk the person and Tesla CEO.
Nevertheless, as the criticism on Musk has increased, Cramer's enthusiasm for him has waned.
Cramer, for one, says he doesn't mind if people gamble against him.