I voted for commodity; I did this based on the active definitions of a currency vs the definition of a commodity.
Ultimate, since BTC is technically finite, I think it has to be looked at as a commodity since its value is very much defined by market operations, and if not now, then eventually, by supply and demand.
I think it's intent is certainly as a currency, but it's current characteristics, to me, really do not align with that of a currency (not backed by a Government FIAT, not a slowly decreasing inherit value if held.
Ultimately, in it's current state, BTC almost acts a currency that is backed by a commodity, although strangely it's almost itself as the commodity too.
Bottom line though, I think that because BTC, by definition, has a finite value, it ought to always be considered a commodity (keeping in mind that commodities can easily be used as currencies).
You know, the foreign exchange market is a global decentralized or over-the-counter market for the trading of currencies. So even if your government define Bitcoin as a currency, then traders can still trade it as a commodity. This is why I would want Bitcoin to be defined as a currency and why I would draw my X at the "
Define Bitcoin as a Currency" option.
The moment when you define Bitcoin as a commodity, you restrict merchants from accepting it as a currency and that will hurt the whole Bitcoin eco-system.