Staking is one of the less risky methods of making extra money in crypto. Ideally, you gotta choose stablecoins but altcoins staking is more common. Pay attention to APR you get. For example, Ethereum and Polygon gives around 3% APR : https://www.stakingrewards.com/asset/ethereum-2-0 or Waterfall Network who gives around 122% APR because they have around 8k validators and want to attract more: https://waterfall.network/use-waterfall/stake-water