[quote name='cochesecochese']The whole 'talking down' thing doesn't work unless you bolster your own arguments with some substance, you know.[/quote]
I'm sorry you thought I was talking down to you. Since what I was talking about already happens today in a limited form, I just didn't understand your objection at all.
A bit of bartering or local currencies being used is rather different than a system that would allow any currency to be used in real time. Every till, of every business, would require a reserve of every kind of legal currency in circulation. Everyone whose hands touch money in a business would have to be aware of the various exchange rates amongst currencies. At all times.
So let's hear your proposal for a system that would allow multiple currencies to circulate.
Don't take this the wrong way, but all it takes is a little imagination, and maybe not even that in this case.
First of all, I never said every business has to accept any currency! If Joe's General Store only wants to accept US dollars, there's nothing wrong with that.
Second, even if every business wanted to accept multiple currencies, the problem has already been solved. The credit card industry already works like this. Let's go through your list:
1. "allow any currency to be used in real time" - This is already handled transparently when you use a credit card from one country in another country.
2. "Every till, of every business, would require a reserve of every kind of legal currency in circulation." - Again, in this case, the business just has to accept credit cards.
3. "Everyone whose hands touch money in a business would have to be aware of the various exchange rates amongst currencies. At all times." - No, because, again, this is handled transparently through credit card transactions. The business sets a price in the currency of their choice, and the customer is charged accordingly.
If anyone reading is about to complain that every business shouldn't have to accept credit cards, let me remind you again that I'm not saying they would. They can accept as few or as many currencies as they want.
Also, the main point of this isn't really for small transactions, but for the purpose of savings. If you have $100,000 in savings, and you want to switch to another currency, it's already easy to do. In fact, removing the restrictions on such activity would
reduce the logistical overhead.