I've heard many of my companions say the bitcoin is the greatest invention in the decade.. But I wonder why every country don't accept this as a legal currency in their general transactions?
Although bitcoin is the greatest invention of the last decade, no state will ever recognize it as its main currency. Bitcoin and other decentralized crypto currency can go in any state only in parallel with the national paper money of this state because the decentralized crypto currency has very high volatility, anonymity and is difficult to control by the state. In addition, decentralized crypto currency is foreign to any state, it has nothing to do with the economy of any state, and all other currencies (except for the dollar) are tied to the economy of their states.