If someone wants to go against you, defend what they are saying and not try to learn more about an argument, you will not get anything about it. I personally believe that a healthy discussion should involve both sides trying to learn each other's opinion and maybe they won't change their views but at least understand each other, whereas there are some people who argue with you just because they want to argue and not even care about your point of view and try to understand it.

Bitcoin is obviously a currency, and it fulfils all of the descriptions and it will always be there, we have a marketcap of 1+ trillion dollars, it doesn't matter if someone puts an argument against it, we already accepted it long time ago.