I generally dislike stablecoins today, due to centralization and trust issues. See #945661

stablechannels don't have those problems, but you have the free options problem, and worse: people really want a stablechannel to avoid massive (80%) drawdowns, but that's exactly when you'd expect them to fail. They risk becoming a complete scam, where the stablechannel peer keeps the upside and walks away on the downside. And you'd never know as long as the price is rising...