what would a low volatility even mean?

So Im thinking a scenario where adoption starts to saturate. Bitcoin is already mainstream, you can buy everything and salaries are paid with it.

In order to get to this there would at least be a transition where usd and bitcoin coexists pair to pair. But, Im strugling to see how would bitcoin maintain its price while eventually flipping usds usage.

Is my understading that if people arent selling bitcoin price goes up. Yet if price goes up things would get cheaper relative to bitcoin, so how does that relate to companies having to adjust your salary. Can there be deflation adjustments and then would you salary decrease in time?

Wtf am i even talking about. Thoughts?