It depends on the airdrop, If the airdrop has potential, like Dogs then I'll hold it for future profit, If I see that the airdrop is an average coin that will likely do a rugpull, I will dump it right away and buy coins with good potential to add to my portfolio.

Airdrops are also investments because you are doing things and tasks and spending a lot of time, This is not something that we used to do 8 years ago, where we only sent our addresses to the developer and they would send you your share, Now you have to work for your shares of airdrops.