It doesn't yet make a lot of sense to use it in a country with a stable currency, such as the US or the rest of the West. But in places without stable currencies, perhaps you'd be surprised to find out that digital currencies are traded for goods much more.
There are some serious problems with Bitcoin and its imitators so far. But I know some people working on some solutions to those problems, and I think the future of such currencies is bright. Lots of technologies have growing pains, and digital currency is no different.
Exactly what places without stable currencies are we seeing “digital currencies traded for goods and much more”?
OH, what happens to this digital currency, when the grid goes poof?
People I know who sell their digital currency for cash.....a fantastic scam. Money for nothing and chicks for free :)