If you have no money, you should select free bounty/airdrop. If you have some savings, you should select invest project. Or you have many free times, you should trying boths. "Failure is the success's mother". Let's practice and experience gotten will help you in future.
It's depend on which type of a person or investors you are, but you can mixed so you can earn more, if you have spare money or your earnings from bounty you can reinvest inside crypto and wait for your luck to grow your investment, there's risk indeed but if you can wait and you know how to play
well then you can earned decent, it's all about how you will take the opportunities and how you will handle the risk factors.