Maybe before no they are noy a currency but not they are pretty much accepted by a lot of people around the world so they are pretty much can be consider as a currency and they will.not be called as a cryptocurrency if they are really not a currency they are just being upgraded once and do not controlled byba government doesn't mean that they are not a currency anymore. It can buy things and it van be exchange into cash so they are a currency for me but we all have different perspective in such things.

Seriously ?
How many times I have read in treats like this.
Think about your coin you have in your physical wallet right now.

What give them value ?
You like your community is the ONLY answer.

And your Goverment call it currency because they recognise it as " official " and can be trade with others in traditional market.

Let's make an example:
What If I need a bottle of milk and you have a cow. Would you give that for free ? Of course not, unless you are a Hare Krishna - so we have to find something to exchange. It could be my hours of work in your fields or something else like for example I can make a cup of tea or whatever.

Money like we used to think are just a easy method to exchange some goods - but we see now that is not the only option

yes, many of the people now uses it, and it is already legalized in some countries as one of their currency, literally bitcoin is a cryptocurrency and we can trade using it , we can also exchange it as our own currency, so therefore i treat it like our own currency, many people always mistaken it and have a problem with it, as long as it has a value we can conclude that this one is a currency.

The bitcoin consists of a string of letters and numbers, called a public key. This public key is a bitcoin address that you can share with others

Let him make his own speculations. We know that nobody can predict what will really happens in the future but for now I can say that bitcoin is indeed making impacts all over the world and those who are threatened by it's presence will surely make wild predictions just to stop bitcoins popularity.

Warren Buffett has already admitted that he do not understand potential of modern technologies and he can not predict their future, like he thought that Facebook is unsuccessful startup, so don`t mind about his words

For your information,bitcoi had step into 9th year now.Do you think,it will no more in a decade.Not at all.Now bitcoin is used as a
one of the currency in many G-20 countries.I think bitcoin was legal in 15 countries of G-20 countries.
Bitcoin is the both currency and asset now.Many people had start to inverse in bitcoin as an asset.

This old man is talking too much and didn't intended to talk like that, obviously he cannot point out Any factors why he said bitcoin is not a currency while in fact Currency means to facilitate transactions. Bitcoin is a currency because bitcoin is making any transactions easy and easier than fiat currency. Bitcoin is making transactions safe and effortless.

Different people using them with different purposes. Some are taking them as asset and start investing in them. And some legends are there who are continuously using them in payment methods and thus they become currency. So yes you are right. It basically depends on the person how he is taking these amazing coins. But majority is now, considering them as an asset not a currency.