If Bitcoin become Legal to the whole country, the question is? what is the basis

[resty]

The question is, what is the standard basis to have regular income for community in terms of value added tax if the Value of Bitcoin Currency is unstable?

[Variogam]

From this point foreign currencies are unstable as well, I mean their exchange rate changes all the time. So the tax procedure should be the same as with foreign currencies.

[CyberKuro]

The question is, what is the standard basis to have regular income for community in terms of value added tax if the Value of Bitcoin Currency is unstable?

Most countries does not have fix regulations about bitcoin, which mean no tax at all and people trade bitcoin on their own risk.
But, there few countries that have regulate about bitcoin, in fact people in USA have to pay taxes for their profits from bitcoin, in short or long term. Citizens will be required to determine the market value of  cryptocurrency in U.S. dollars as of the date of payment or receipt.
Income that is earned through the exchange of services with another person, whether in the form of bitcoins, dollars, or barter; is included in gross income, and would be subject to income tax at applicable rates. Also these bitcoins could be subject to self employment tax.
In some jurisdictions, income earned through the process of buying and selling bitcoins would also be included in gross income, but would be treated as capital gains. https://en.bitcoin.it/wiki/Tax_compliance

[Mpamaegbu]

The question is, what is the standard basis to have regular income for community in terms of value added tax if the Value of Bitcoin Currency is unstable?

I really do not see how calculating tax should be an issue for any country using Bitcoin as part of its financial instrument. Isn't tax calculated in percentage? Off course, it is. So, the deductions should be done on percentage on each transaction. That should be the basis. By the way, aren't the dollar, pounds sterling and euros unstable too?

[Theb]

The basis of your tax on a standard will be the current fair market value of its fiat currency equivalent. Which means if you will reflect you income from Bitcoin transactions you will convert it to its fiat currency equivalent during the transaction it was taking. To keep it simple just think of it in terms of Fiat currency where you don't look at the appreciation and depreciation of Bitcoin as it will really confuse you.

[Mysterious01]

The question is, what is the standard basis to have regular income for community in terms of value added tax if the Value of Bitcoin Currency is unstable?

Other currencies are also not stable but in bitcoin the fluctuation of its value is kinda scary compare to other currencies.
Bitcoin is somewhat another way of income and the government will surely find a way to earn money from us using the tax and I am not sure if they will have a regular basis.
I'm sure they are only after in our profit, so as long as we have profit they are going to issue us a tax.