Stablecoin enables traditional currencies to stabilize. All this while still using blockchain technology to make transactions even faster and more accessibly safe. If stablecoins were to do well, that would raise global demand for the dollar.
That sentence makes the 1st part a speculation:
If stable coins were to do well, and if not so no stability. Should a country desire a stable currency they just should establish trust. Stopp banks to abuse, make people trust their currency.
A stable-coin is not stable at all ,they a mimicked mostly on the value of the $, a currency which itself has suffered devaluation.