A lot of people are quick to make assumptions like this, but when you think about it using Bitcoin is neutral or even a net negative for the regional / worldwide economy. Because think about it, if people don't need the middlemen (being banks and such) because they have miners and computers pretty much doing everything, that's going to kill a ton of jobs. Even if these jobs are for the bank, it's still normal everyday people that are getting hurt in between because they're going to lost their jobs if Bitcoin was to go mainstream.
So, net negative IMO even if I do love btc.
Anything we can automate, we should. Otherwise we'd still be stuck in the pre-industrial area without any social or technological progress at all.
Free up workforce from unnecessary, menial tasks and put those people to good use elsewhere. It already happened to most manual labor, why should finance be exempt? For every job that becomes obsolete, new opportunities will arise. As a result global productivity and thus wealth will increase, it's just the matter of fair distribution that is worrisome.