You pick you favorite currency (or portfolio) as a store-of-value, and then if you need to trade with other people, your client and portfolio negotiates with their client and portfolio to arrange an acceptable exchange. Then you use a decentralized network of exchanges to restore any ratios you want to maintain.
This allows people to create their own currency and enforce it's particular use, backing it explicitly. For example, you could crate 'SoylentCoin', which can be cashed in for 1 month of Soylent shipped by a certain date. You sell it for some price that keeps you in business, but then the market is free to trade it at-will and you can hit more efficient price points for your product. Sometimes you might find that your product is worth a lot more than you are selling it for.
Or in a decentralized example, you could do proof-of-resource sale that sells coins directly transferable to a type of resource. In example of disk storage, you provide storage to the network in return for disk-coins. To get the storage, you need to buy disk-coins. This isolates the disk-coin price to the supply and demand of disk storage precisely. Anyone can participate, and upon buying or selling the disk-coin, they can immediately convert to or from whatever portfolio of coins they personally maintain.
It's tends to not be a popular opinion around here (there are probably a few with vested interests), but Bitcoin as a currency is fatally flawed. It's supply is structured so that Bitcoin perpetually increases in value, thereby perpetually slowing down the velocity of Bitcoin transactions.
It's deflationary property is a feature, not a flaw.
| It's deflationary property is a feature, not a flaw.
I studied this while getting my economics degree. Methinks you are missing some important behavioral dynamics related to interest rate interactions with consumption and investment.
Here's a lesson from the fed: http://www.philadelphiafed.org/education/teachers/resources/...
What stops Goldman Sachs from seeding a cryptocurrency tomorrow with a market cap that massively eclipses BTC? The big IBanks are sloshing billions and billions of dollars around all the time. There is this assumption that BitCoin is so big that it is the winner, but it is "so big" relative to a bunch of people that aren't in the world financial system today.
And, of course, this all assumes that big banks are forward thinking enough to see coins as worthwhile, and that they have the kind of developer power in a new and obscure area to outperform 5 years of FOSS development before anyone else beats them to it.
Why would Apple create their own app store, when they could just use existing ones?
What we really need is a gateway system that will intelligently convert between your local currency -> the cryptocurrency with the best liquidity/exchange rate -> the destination currency.
Interestingly, I could see this leading to automatically generated cryptocurrencies, as various popular cryptocurrencies fall below liquidity, transaction time, and/or exchange rate thresholds. Over time, I'd expect to see some interesting competition and arbitrage between cryptocurrencies going on behind the scenes, all computer controlled.