They're not talking about volatility; they're talking about the average trend over time.
Short term volatility is a big disadvantage, while gradual loss in value doesn't matter for something that's not a long term investment.
I owe way more money than I have in cash, as does almost everyone, and my loans being in nominal currency, inflation only helps.
Which ultimately just ends up in people wanting speculation.
A bit of a generalisation, but I know plenty of people who hold Bitcoin and they all are buying it because it might be worth more in the future, and none are buying it to transact in Bitcoin and use it as a currency.
Ah, fair enough. That said:
> I owe way more money than I have in cash, as does almost everyone, and my loans being in nominal currency, inflation only helps.
This only works if you have a effective means of prohibiting (any) interest on those loans (ie anti-usury laws that actually have teeth). Otherwise the lender just bakes inflation into the interest.
That said, there are variable rate loans, but last year some lenders were actually offering such loans at a noticeable discount to prime (albeit with a floor that is above prime for now).