For the new people in crypto like you, let me list some real stable coins.
Decred
Binance Coin
Ravencoin
Tezos
Ravencoin
Metaverse ETP
Tether
TrueUSD
Nice, he got it completely wrong. Thanks for correcting him, so he wont mislead newcomers. There is also new token called nUSD which is a part of Havven project, that should be performing as a stable coin. I have only used tether, though.
Havven token is not so stable, you can see that even the stable coin of havven still get a lot of volatility. It can't be considered as a stable coin and all of the formula that has already implemented by the havven project is failed. This based on the fact that has already happened with the havven token price.