I thought the FinCen statement a while back pretty much indicated it was a currency. I could have misunderstood, though. One could certainly argue that money and currency aren't equal. Here's some food for thought, though, do precious metals dealers have to register as money transmitters for selling commodities for cash? I know there were some recent law changes for coins, and I think those laws revert next for year, but in general, is gold "money" in the eyes of FinCen, does money=currency in their eyes, or do we really not know? Moreover, does the IRS care what FinCen thinks?
Let's assume it's currency for further discussion based on FinCen talking about it and saying spending it doesn't make you a money transmitter. When you buy something and reside in US states that charge sales tax, you are supposed to pay sales tax on that purchase at the end of the year if you didn't do so at the time of the transaction. US taxes (and state taxes in the US) must be paid in US dollars by law, and the sell price must be converted to US dollars (which is generally done at the time of purchase by your credit card company if you buy in some other currency). I'm not sure if/how that applies to barter, but assuming barter isn't taxed as sales tax, I'm guessing bitcoin would be considered currency to states that have sales tax unless the IRS didn't allow states to treat it differently than the federal government (and they had some reason to treat it differently than currency). Considering that some people are already paid in bitcoin, I'm thinking the IRS will want to treat it as currency to collect income tax.
That having been said, if you trade currencies regularly on an exchange in order to try to make a profit, what do you have to do? I'm thinking that's capital gains/losses even though it is currencies. My understanding is those exchanges have to convert to US at midnight each for some tax reason, so holding overnight leads to some expenses, and this would mean currency trading isn't historically something that can be done "long term" (over a year in a position). On the other hand, if I go to Europe and withdraw some Euros from an ATM on a day that the Euro happens to have temporarily crashed, then come home and convert the Euro to USD for a gain vs what I withdrew (even after ATM and exchange fees), was that a capital gain even though it wasn't really an investment and I'm making an exchange for equal value? Does anyone actually claim capital losses when they travel and have to convert currency? Realistically, such exchanges are practically a guaranteed loss, and I don't know that it can be claimed (one would like to think the IRS can't have it both ways). Regarding all of that, I only tried once, and not really hard, but I didn't find much in IRS publishings about currency exchange in general.
So if BitCoin is currency, I think the real question is, for currency exchange, does intent matter (investment vs exchange to spend / local currency) to tax law, and what tax law applies? If it is a commodity, then the procedure is out there and followed by anyone who trades securities, but yeah, it could put you on someone's radar.
Anyway, does anyone have any input (answers/corrections/thoughts) regarding my currency exchange questions?