The biggest stablecoin is the USDT for Tether, but I'm not bullish on it because it doesn't have a real entity.
The most successful one in my opinion so far is DAI, but it still has a lot of problems. I expect to see stablecoin with different solutions.
Standard Protocol is an innovative stablecoin project that I have seen recently.
Let's discuss with anyone who is also concerned about stablecoin.
Why would you be "bullish" on a stable coin? Does that even make sense? For now it is mainly used as a hedging mechanism against falling prices or as a more appropriate option for more precise pricing at exchanges.
It is cumbersome to trade BTC/LTC pairs if instead you can have it denominated in USDT, which gives you a clear picture of what it costs right now.
Stable coins will foster adoption though once it becomes more common to accept stable coins in stores.