The timing of a migration away from dollars will depend mostly on US fiscal and monetary policy. Better financial infrastructure on-chain isn't going to do it alone.
The stablecoins will absolutely accelerate the transition, so that when it does happen, it happens more quickly. Anyone with a stablecoin can transact on-chain for something else. And anyone holding stablecoins will be using an app that has familiarized them with the idea of alternate currencies and currency exchanges.
This is probably a good thing. A realistic not terrible scenario is a few year period where you have to pay attention to exchange rates, but your net-worth is mostly unaffected and at the end of it you're paying for groceries with something that's not USD.
The stablecoins will absolutely accelerate the transition, so that when it does happen, it happens more quickly. Anyone with a stablecoin can transact on-chain for something else. And anyone holding stablecoins will be using an app that has familiarized them with the idea of alternate currencies and currency exchanges.
This is probably a good thing. A realistic not terrible scenario is a few year period where you have to pay attention to exchange rates, but your net-worth is mostly unaffected and at the end of it you're paying for groceries with something that's not USD.