With bitcoin prices bouncing around from day to day and even minute to minute, it’s incredibly difficult to tie down finance professionals to a concrete prediction on where the cryptocurrency is heading. Nobody wants to be wrong, after all, and with cryptocurrencies’ extreme volatility, it’s highly likely that their predictions could be very wrong. So how do finance gurus handle the topic of bitcoin’s future without painting themselves into a corner? Increasingly, they avoid the question and talk about blockchain instead. Recently, it’s practically the default response of people in the industry to start singing the praises of blockchain when anyone asks them about bitcoin. Wall Street Journal tech columnist…