The question was why do you not consider bitcoins a currency. The simple answer is that for it to be a currency it has to have a perception of currency.
No, I think the question was:
Out of curiosity, what leads you to believe BTC is not real money?
I didn't ask about currency, and regardless I was looking for an answer from the OP, out of curiosity.
The definitions here are ambiguous and the terms real money and currency seemingly interchangeable.
I'm not trying to be an ass, but if you think about it there is no value to anything besides it's perception. Various factors affect perception but in a labor theory of value we derive value in labor. Which is a benefit of a gold backed currency and bitcoin as well, at least, over fiat. So I do see that it can possibly become real money but money is only real if people believe it to be money.