Coinbase CEO Brian Armstrong appears to have no regrets after taking a moment at the end of the company's earnings call to troll prediction market traders. "The conference call was me just having a little bit of fun," Armstrong told New York Times columnist Andrew Ross Sorkin during Wednesday's "Dealbook Summit." At the end of Coinbase's third-quarter earnings call in late October, Armstrong referenced that he was aware of what prediction markets were betting he would say. At the time,