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Bitcoin rocketed past $15,000 Thursday. Photo: Rick Bowmer / AP

Bitcoin rocketed past the $19,000 mark Thursday morning, before falling sharply to $15,000 around where it stayed for most of the afternoon. The surge continues what's been a remarkable week for the digital currency, which broke $13,000 Wednesday. Bitcoin now has a market value of more than $270 billion, per CNBC, meaning it would rank among the 20 largest stocks in the S&P 500.

Expand chart
Data: CoinDesk; Chart: Axios Visuals

Why it matters: Bitcoin, which began the year below $1,000, has had a wild streak in recent weeks, leading Wall Street to jump into the ring on Friday. And while some currency experts warn that the Bitcoin's recent price surge has created a bubble, others argue its success is due to delayed recognition by the broader financial community that cryptocurrencies are becoming mainstream.

Go deeper

Tony Hsieh, longtime Zappos CEO, dies at 46

Tony Hsieh. Photo: FilmMagic/FilmMagic

Tony Hsieh, the longtime ex-chief executive of Zappos, died on Friday after being injured in a house fire, his lawyer told the Las Vegas Review-Journal. He was 46.

The big picture: Hsieh was known for his unique approach to management, and following the 2008 recession his ongoing investment and efforts to revitalize the downtown Las Vegas area.

Dan Primack, author of Pro Rata
5 hours ago - Economy & Business

The unicorn stampede is coming

Illustration: Annelise Capossela/Axios

Airbnb and DoorDash plan to go public in the next few weeks, capping off a very busy year for IPOs.

What's next: You ain't seen nothing yet.

19 hours ago - World

Maximum pressure campaign escalates with Fakhrizadeh killing

Photo: Fars News Agency via AP

The assassination of Mohsen Fakhrizadeh, the architect of Iran’s military nuclear program, is a new height in the maximum pressure campaign led by the Trump administration and the Netanyahu government against Iran.

Why it matters: It exceeds the capture of the Iranian nuclear archives by the Mossad, and the sabotage in the advanced centrifuge facility in Natanz.