As i understand, a volatile is the way how fast a certain matter evaporates. As to cryptonomics, volatility is making other people rich while others hate cryptos too. But in the case of fiat as in US Dollar, i can't describe it as volatile at all because its value remains the same for years.
i don't think like that. as long as there is a transaction of course there will be volacity. but as far as i know, the dollar volacity is not like cryptocurrency, where the volacity is very high