So when compared to bitcoin, if it is pegged to the various currencies, I see 'no way' that it can be used as a store of value like Bitcoin.
If it's going to be a stablecoin, I'd worry more about the future stablecoin projects (not so much about currently successful ones though - they already have a userbase)
That's unless they're going to do strict KYC, in which case it's probably going to have much less impact on other stablecoins. Don't see the whole stablecoin userbase following a Facebook KYC anytime soon.