Staked Frax USD (SFRXUSD) is a cryptocurrency that is pegged to the value of the US dollar and can be earned by staking Frax (FRAX) tokens. Staking involves locking up FRAX tokens in a smart contract to receive rewards in SFRXUSD. This stablecoin provides users with a way to earn passive income while also maintaining price stability tied to the US dollar. It is a popular choice for those looking to hedge against market volatility and earn a return on their cryptocurrency holdings.