This article serves as a good follow up to the last one, as well as providing a (very) basic primer on how BitCoin actually works.
The comments might actually be worth reading here as well. As is usually for Ars, they’re a sea of scepticism about cryptocurrency. Some of the complaints are pretty valid, whilst other are spurious. Either way, it’s always worth exploring sceptical viewpoints.
That said, I’m reminded of the tone of some previous Ars comment threads about Snapchat. A lot of arguments which actually boil down to “I don’t understand this,” and “I can only think of nefarious uses for this.”