Generally there is potential for other anonymous coins. It's possible and yet, like zcash or other coins no coin tried to go the full way like Monero did.
It's a community project which makes it special. Private stablecoins can be a vehicle to onboard people to our world and it should be explored, but Monero isn't just a tool imo.
It's an ideology that goes beyond transacting anonymously because beeing anonymous it's good. It's about abolishing the state and use agorism to build something new and healthy. Stable/Fiatcoins isn't what we desire since it's backed by the state and in the interest of a state. It even is a threat since it takes the crypto paradigm and swollows the ideology that came with it.
Monero is very impressive project and that's why we have high standards for everything else. We laugh about Ethereum trying to bring more privacy, because it's mostly a corpo. coin and not doing it because they have a strong ideology. Them doing it is good, but us doing it for a long time and out of principle makes them laughable.