For those who are new to Bitcoin and would like to learn more: Bitcoin FAQ - https://en.bitcoin.it/wiki/FAQ Bitcoin Wiki - https://en.bitcoin.it/wiki/Main_Page How Bitcoin Works - https://en.bitcoin.it/wiki/How_bitcoin_works Installing Bitcoin - https://en.bitcoin.it/wiki/Getting_started HowTo Mining Bitcoin: Fedora 14: http://bit.ly/fb54ye and Ubuntu: http://bit.ly/ewVzhu The Bitcoin Faucet (free bitcoins) - https:/…
OK, I understand how they're created and how many there are. But why?
Last time this came up on HN BitCoin's FAQ had a question directly asking what useful thing it backs to. I say "asking" because the answer was basically no answer at all. I see it is no longer there. This is because if they can't answer it, it is better for them not to bring the question up at all, so I guess it's a good move for them.
Currencies have to back to something. Dollars back to being able to pay the various governments of the US not to throw you in jail for breaking various laws (tax, fines, etc); a dollar is useful even in Africa to someone not subject to those laws, because you can trade it to somebody else who has that use. The way an economy works allows the value of a dollar to appear to become severed from its backing and just float in space, propped up only by mutual consensus, but this is an illusion. When the backing goes, so does the currency. History's full of examples, just look up "hyperinflation".
(Also note the difference between backing and rarity. Anybody can make something rare, backing means it's actually worth something even on its own.)
Bitcoins provide an interesting technology platform around which to build a currency, but trying to use them directly as currency is only slightly different than using Monopoly money, and the differences aren't relevant.