it's a mistake, though. the word durrency appears no where in the article.
probably a typo but it would be a cool portmanteau of digital and currency.
That's what I thought it was. And even that being the case, it's a little face-palmy. It makes the whole matter seem even sillier than it already is. :|
If that were the actual case, "digital durrency" would be horribly redundant. Just a typo IMO.