But the most common one is staking where it is just like time deposit in crypto. I usually do that in some mainnet platforms like in Ethereum, Linea, zkSync ERA, etc.
staking assets is probably the easiest thing to do. OP, be careful not to be too trusting of staking platforms. or maybe web for cloud mining. if you deposit your assets, you can lose everything if you don't choose the right platform.
but I also can't be satisfied with the APR offered for some platforms. if you have trading skills, you can use them. I prefer trading than staking. but if not, staking may be a better alternative.
Though trading is not passive income, you'll need to be awake at that time, unlike staking, but I do prefer more trading, as staking is somewhat for me not a sure profit because sometimes your funds get locked out as there are scam platforms and I don't see a future on it, unlike trading, where you can earn anytime as long as your entries are good, but the downside is that it ain't passive and you'll need to get your hands dirty to learn them.