Will I earn a high interest rate on stable coins?

Depending on the platform where you're investing your stable coins, you can definitely earn a high interest rate on them. Specifically, many platforms will pay a high yield (5-15%) on reputable stablecoins like USD Tether (USDT), USD Coin (USDC), and DAI. So yes, you can earn a high interest on stable coins, as long as you invest & hold them at a reputable platform - consider choosing between the big ones like Binance, Coinbase, Nexo, etc. Also, make sure the stablecoins you're buying are recently audited. Unfortunately, there have been stablecoins in the past that haven't proven to be "stable" (like the TerraLuna project), so consider going with coins that have been recently audited, like USDC (USD Coin).