Join some bounty campaign in Airdrop is best way to earn that. Then after you get tokens. You can sell it in exchange thread in this forum. Don't forget to do Escrow to transaction with buyer. Because they are many scammer can scam your tokens
Airdrop is the best way to earn? You should be aware of the current situation of these airdrops, too many of them fail along their run promotions. Many have failed to even at least put their tokens to an exchange, they keep on giving false promises.
This is the modern complains of those people that are into airdrops today. Stop wasting your time with airdrops, you have something better to do like improving yourself on how to trade or be a partner in affiliation.