Would a stable value be of any use to Decred cryptocurrency ? Would it be a good idea at all ? From Ethereum / Vbuterin : "The true cryptoeconomy of the future may have not even begun to take shape."
There are no stable currencies. Look at USD to EUR over the last 5 years. http://www.bloomberg.com/quote/EURUSD:CUR
Very true about fiat currency exchange rates. They are based mostly off of GDP(and a thousand other factors yeah yeah I know). So what is the 'GDP' of each crypto currency? Can we even compare it this way? I am not sure. Country exchange rates are a different country, literally. Crypto exchange rates are a different universe between some coins.
In a sense, crypto currencies are a commodity, like gold, or silver... The value is totally market driven. But no currency or commodity is truly stable. Which is amusing, since markets are designed to stabilize commodity prices...
Anything traded in a market of any form can't really be stable. The absolute closest that I'm aware of would be NuBits. It's a decentralized currency that is constantly adjusted to be worth exactly $1.00 USD. Even still this is technically not stable because, as Lee Sharp has already stated, USD fluctuates as well. I don't see any particular worth in NuBits, aside from perhaps storing money without worrying about extreme fluctuations.