lets clarify points mis-understood by previous posts. especially the OP.

currency can be anything. cigarettes in prison, vodka for favours in russia, etc. so currency so not a sustainable loop. currency includes products, favours, money, stocks, shares, commodities, property, assets, etc...

a sustainable loop is a small segment of the umbrella category of currency. and the OP should realize this small segment he talks about is 'money', thus the OP's topic should be that 'bitcoin is not money and this is why'

before the rebuttles come in.. money is not limited to FIAT (federally owned monetary currency) or legal tender or whatever.. money is the main sustainable currency used in any economy no matter who rules it, who owns it or how its used.

now lets move onto commodities.. as i hate that silly misconception.. bitcoin is not tangible or intrinsic (keywords of commodities), bitcoin however is in the realm of being an ASSET currency...

now with that said. bitcoin is a currency, its an asset currency, but it has not got to the point of being treated as money...... yet!