Most of the time I like to do trade for earning cryptos. I know it's not very easy, I have lost a lot of money in trade. but now I am good with trade. Now I know how to use stop-loss, how to manage risk etc. I am also holding some altcoins for a long time, I hope those coins will give me some nice profit.

The airdrop was one of my favorite methods to earn some cryptos easily, But nowadays most of the airdrops are scams. So there is no need to waste time to join airdrop. This forum is also a good place to earn some crypto. but for this, I need to spend a good time here. 
But trust me, It's worth it.

Staking altcoin is also a good way to earn some cryptos. Now a lot of exchange support staking system. You can earn a good passive income with the help of a stake.