I do not fully understand Stable coins.
it seems they remove market fluctuation (stable) and instead pay holders in yield.
Is that basically correct?
To get yield from a stable coin do I need to Stack it or is it automatic?
Stable coins track USD fiat 1:1 but all have different features. This includes
Tether
USDC
DAI
Binance USD
etc.
It is used typically for holding cash and swapping between coins. Some pay yld as well so you are correct ;)