There were numerous positive developments driving the sector higher in recent days.It's not hyperbole to say that this week might go down in history as one of the best for cryptocurrency stock investors. It's sure been quite a boon for cryptocurrencies themselves, and the companies that mine and invest in them were surging across the five-day trading period, too. This wasn't only a coattail increase, either -- several had good news of their very own to report.Some even posted share price gains well into the ...