10% yearly profit doing almost nothing, no mining, not elecricity cost for you miner ... no more bills, just get your ETH ready & load your node & get the easiset ETH you'll ever have is most probably on of the biggest dream of old ETH holders.
Source: https://blog.ethereum.org/2020/07/27/eth2-validator-launchpad/ This way is more efficient than mining with asic or gpu device + electricity cost. But you need more money to buy the coin first.
What is the minimum amount to become a valid validator ? 33 ETH ?