The real question is if bitcoin is stable, would it encourage companies you mention to start accepting crypto into their payment systems. Acceptance of crypto goes beyond being stable. If you look at the alt market, you will realize that there are certain coins that have not moved significantly over the last few months or hovering in a particular range, which can be said to be stable but does that mean it will be adopted? Of course not because it goes beyond that. What is the degree of acceptance or the ease of exchange to fiat, the control, the sustainability, the spread among other test that it must pass before being considered by any company.