Bitcoin jumps 20% after Elon Musk adds #bitcoin to his Twitter bio

Elon Musk added the hashtag #bitcoin to his Twitter bio, after which Bitcoin skyrocketed as much as 20%.

The virtual currency climbed suddenly at around 3:30 a.m. ET, adding $5,000 in the space of an hour to trade at $37,299, according to data from industry site CoinDesk. At 8:00 a.m. ET, it extended gains to trade around $37,653.

Musk added #bitcoin to his Twitter bio earlier Friday morning. He also sent out a cryptic tweet, saying: “In retrospect, it was inevitable.”

It adds to the wild volatility in markets this week, as the stock prices of heavily-shorted companies like GameStop and AMC surged dramatically thanks to a rush of amateur investors inspired by the Reddit forum WallStreetBets.

Another subreddit group, SatoshiStreetBets, led investors to pump up the price of Dogecoin, a cryptocurrency inspired by the popular “doge” meme. Dogecoin was up 800% in the last 24 hours at one point.

Bitcoin’s price action had been relatively muted ahead of Friday. The world’s most valuable cryptocurrency hit an all-time high of $41,940 earlier this month before sinking sharply a week later. It briefly fell below the $30,000 mark just last week.