Satoshi Nakamoto’s unit of decentralized exchange explodes to a gut-punching all-time high of $19,783 per bitcoin, one week after bitcoin futures made their debut on the Chicago Board Options Exchange. The good feeling doesn’t last long: Suspicious trading preceding the Coinbase debut of the bitcoin spinoff, Bitcoin Cash, a few days later leads to a major sell-off, and on December 22, bitcoin drops below $13,000. The market rallies back up to a more sober $15,000 per bitcoin over Christmas weekend.