Stable in fiat means a stable rate of devaluation, not stable valuation.
Discussion
Yeah, I'm sure if you just say explain that to millions of Argentinians Tether will stop dominating their market tomorrow.
Fair enough. But words are important. Presenting something as stable may be accurate if the use case is short term holding but less so if held longer. That said, most people are unfamiliar with the term 'fiat' so that may just cause confusion.