There are a lot of ways you can earn in cryptocurrency.
Here are the two examples of the most commonly used method
1.) Staking - Staking coins is a way to gain consistent returns on your cryptocurrency portfolio if you want to earn 1% a day. The standard holding period for staking is one to six months, but various fixed periods are available.
2.) Mining - You can profit from cryptocurrency without having to invest any capital. Bitcoin miners are rewarded with Bitcoin when they complete "blocks" of validated transactions added to the blockchain.
3. Trading - if you have enough knowledge and capital in trading, you can get a passive income from it. Just learn first before do trading to avoid huge losses if ever.
It is risky and couldn't be considered as passive income IMO.
Honestly, we can't find passive income here in crypto. Yes, you can make huge money from here
IF given a chance and so unfortunate that not all the time comes.
If are absolutely looking for a passive income, let's have to find a stable job rather than staying here. Maybe offering skilled service in the forum could help but not taking, mining, and trading.