buying and selling rETH back again for ETH is barely feasible when the staking liquidity pool has adequate ETH in it to manage your trade. That is Rocket Pool's pool of ETH that comes from two resources:
ETH that other https://dev.to/cleopatramorris_d539d19ea/rocket-pool-the-future-of-decentralized-ethereum-stakingintroduction-1m2b