In my country, Bitcoin is considered as an asset and so, as long as I do not convert it into fiat money, I have nothing to pay on it or any profit I make in bitcoins. Well that is the only thing that is good in my fiscality.
Also in our country, bitcoin is being regarded as property thus making it impossible for legal tender. Currently, there are no laws prohibiting the usage of bitcoin but mining bitcoin falls under the 'other income' category which is taxable in our country. Fortunately, I own my bitcoins through participating into campaign signatures and through investments. The question is highly dependent on the country of an individual and is relative in terms of scope of each governance. There are countries out there who imposed tax regarding the utilization of bitcoin and you should also check your country regarding the laws to avoid any future conflicts.