Bitcoin’s creator vanished in 2011 after being invited to meet the CIA. His last email stated, “I’ve moved on to other things.” Before he disappeared, Satoshi was working on a marketplace built into Bitcoin. Now, a working version of this technology has been quietly released by an anonymous team of developers. Satoshi’s original Bitcoin source code included an unfinished marketplace in line 69 of the headers file. “I was trying to implement an eBay-style marketplace built into the client,” he said in a 2011 email to Mike Hearn.