Volatility is a measurable thing, though. In 1985, 1 USD was worth 260 JPY. In 2011, 1 USD was worth 76 JPY. In that 40 year history, those are the extreme high/low ends. That's a ~70% swing over the span of 26 years. By comparison, Bitcoin had a 95% swing between September 2024 and December 2024.

All volatility is not equal. The degree to which Bitcoin is volatile is unmatched by any government currency I'm aware of.