I have no idea about the technical part of Gulden.  When I heard of it, it was pretty clear to me that this was a name-trick.  The Gulden was the former fiat money of The Netherlands, and was in general considered a strong currency (like the Deutsch Mark).  It has been replaced by the Euro, and since many years, the Dutch are becoming more and more Euro-critical.  So a "digital version" of their beloved former Gulden may have a nationalistic and nostalgic appeal.

My impression was that this was the main "value proposition" of the Gulden: to seduce nostaligics into it, as there are quite a bit of them.  But it may be that the Gulden has also really something to offer, apart from sentiment ; I don't know.  But I would be seriously wary about the fact that the name has been chosen to play on a sentimental chord.