Yes, perhaps all his saying is just his own opinion and speculations with no formal or proper basis. As far as i know Bitcoin is a virtual or digital currency circulated over the internet because it has corresponded market value and convertible for any of our local money and even what big man says about it, still I will continue working for Bitcoin and grab this opportunity while still ticking

We have different perception towards to this currency, some of them dislike bitcoin and wants to expressed their thoughts and ideas to inform people based on what they feel, on the other side some of them support bitcoin cause they know this currency much, they have knowledge and brcame part with their life. Mr. Warren Buffet maybe belong to the first sentence that I said, I doubt, because there so much reason why like him dislike bitcoin. No matter what it is just let him be.

after the G20 meeting yesterday, it was discussed by them that bitcoin has no currency property but can be recognized as a digital asset that has valuable asset value. if according to a man named Warren Buffett that bitcoin can only be used 10 to 20 years, I think it's just his personal predictions. all crypto users must believe that bitcoin will continue to grow and its existence will surely be further developed by the younger generation's successors who are focused and have special expertise in this technology field.

Bitcoin is not a currency. Well at least not officially. It cannot be as it's current form now as it so volatile that it wouldn't be able to fulfill transactions. Yet the concept of crypto is very useful as money is going digital now and we need to protect it.

Bitcoin is a digital currency and i think it is also a currency same as fiat money.
It is not too far to compare  bitcoin to any other fiat money because some  benefits of it is almost alike of  fiat.
You can buy some stuff use in payments and other expenditure.

Maybe you are less learn about bitcoin. We have different perception towards to this currency, some of them dislike bitcoin and wants to expressed their thoughts and ideas to inform people based on what they feel, on the other side some of them support bitcoin cause they know this currency much, they have knowledge and became part with their life.

May be he was or may be he had been in trouble with bitcoin or something like that that is why he says something like that. Well, for argument from common consent mostly people believes that bitcoin is a currency while him isn't so, my assumption are something like that.

For now it's definitely not and even the G20 don't considered it as the currency as it does not provide the 3 basis noms that current have....but I don't think it will last longer...technology need to be accepted sooner or later ....it just a matter of time...people and government will understand it's hidden potential and may be some day they will change there mind...It's just wait and watch polocies

Bitcoin is NOT a currency, it is an empty numerical value. Currency is a legally binding instrument that preserves and protects the ownership rights, while numerical values on paper bills or on banks' computers are just mathematical objects that measure the size of these rights. Here is more detailed explanation: https://cryptofraud.wordpress.com/