Trading is the most simple way. In the past year, i have learned that you can earn free money by joining airdrop with your ETH. I have locked and bridged some of my ETH in various project and layer 2's from which i have earned a substential amount of altcoin that can be converted back to ETH. In this process, i didn't need to burn any of my assets. I just lost some of the fees. There are some other ways that can be used to earn money in crypto, like providing liquidity in some of the dapps and i have heard that it is even possible to earn money by running node.