I think not a currency, because bitcoin is a crypto and not a real currency, bitcoin is a digital money and not a real money, but bitcoin is now getting bigger and bigger also bitcoin is unstoppable in spreading world wide, thats why it is very confidential, maybe when the future comes it can be called a Currency because of its large amount.
I am sorry, I dissagree with you. Bitcoin was made to become a currency. People are already using bitcoin as medium of exchange in online shop, although many countries are considere bitcoin as asset but it still a currency with many features which better that cash. Bitcoin is growing popularities in developing countries because bitcoin can help unbanked people which find difficulties in sending money, with many benefits that bitcoin gives to us, I am sure that bitcoin is the new era of currency.