"Can't" is not the right word to use here. it is more like "won't". because we can use it as a currency and many of us are using it, but also many choose not to because of volatility and the greed that creates.


no it is nothing like gold. because you can never use gold dust to buy something even if it is valuable since the other party can not easily verify the authenticity of  the gold dust. it may be rust for all he knows. but with bitcoin he can easily verify it and never get scammed and you can use a small amount of bitcoin