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?
I think the government has no control over digital money, so there will be barriers.
Why do you think that the government does not have the ability to control users of cryptocurrencies? All cryptocurrency exchanges require users to submit the same set of documents that are required to open a Bank account. I am confident that this data will be made available to the government on demand. Cryptocurrencies are anonymous only until the user has used the exchange for Fiat.