This interested points to make money in cryptocurrency with free, join an airdrop project and be diligent to make research or getting information about airdrop project. Recently many people have dedicate their self make airdrop as main income after receiving much money and easily earn much from airdrop project.
Then allocated few percent or airdrop reward for investing and most of them need skill or knowledge before holding their assets in top potential coins as short or long term investment.

Participating in airdrop is low risk earn or make money in cryptocurrency because not spent capital such as investment and we got reward from airdrop by free after completing all task needed. But don't forget for investing in cryptocurrency after earning or making money from airdrop project to avoid some time airdrop not be popular anymore.