Vincenzo, are you sure about that? I thought there was supposed to be gold that is secured to be used as exchange for the dollar amount. Maybe gold is used by bitcoins but I think the main concern here is the tangibility because unlike dollars it can't just go missing or be in a wallet.
Actually, Bitcoin is not backed by anything. There are new alternatives that are being created that are backed by gold/silver to rival the Bitcoin. Bitcoin generates it value by controlling the amount of Bitcoin on the open market and watching the demand for the product. If you were on the ground floor, you would have realized profits of over 100x of your original investment. I think right now, that people are using this currency to avoid some taxation and other fees not to mention profit.
Http://pricedingold.com/bitcoin/
Http://www.forbes.com/sites/petercohan/2013/04/11/bitcoin-or-gold-which-is-more-fiat-proof/
So for Bitcoin users, it is basically a faith based backing that keep Bitcoin afloat, along with controls of the quantity available on the market. What I don't fully understand is how it is digital. Seeing as though hackers can break into anything these days, I would be concerned that someone could steal Bitcoins - virtually or create fake Bitcoins - virtually. If you play with the quantities on the market or better yet, if people hear that their holding of Bitcoins is being diminished by fake Bitcoins, the value will be even more volital than today. Not to mention, all the governments are going to figure out how to get their beaks wet in that profit stream if it continues.
Edited: Vincenzo on 23rd Mar, 2014 - 1:45am
I am pretty sure it is the alure of avoiding taxes and the trade is basically non-traceable. Additionally, they have said that have a target of maximum units to be generated, so people know how close to the end quantity is out there...it kind of makes it special and more desireable knowing that there are only so many Bitcoins to be made.
The IRS has decided to decisively get involved. This is the end of any kind of tax evasion for the Bitcoin industry: