But the September dip didn’t last long. The market got a fresh jolt of enthusiasm when the first U.S. bitcoin exchange-traded fund – a bitcoin futures ETF, that is – launched in the fourth quarter. Bitcoin climbed from $40,000 toward $65,000 in October, spurring visions of $100,000 by the end of the year. It was not to be: The rally fizzled, bitcoin’s notorious volatility returned, and the six-figure price prediction proved wildly optimistic.