No, airdrops isn't really trusted way to earn money, but if you have a lot of free time, then you can try doing that. But don't expect to get high profit like it was back in 2017
I have started joining airdrop since 2017. I can't count how many airdrops I've joined and yet, I never had a chance to earn at least one of the airdrops I've participated with. Joining in airdrop is such a waste of time. I have a lot of dead coins in my wallet and it's really annoying. I don't really suggest joining in airdrop.