How do you make money from crypto with zero investment?

Isn't it true that in order to invest in cryptocurrency, you need to have some initial capital? So, how is it possible to generate income from cryptocurrency with absolutely no investment? Is there a specific strategy or approach that one can follow to earn money in the crypto space without having to put any money down initially? Are there any legitimate ways to benefit from the cryptocurrency market without having to risk any of your own funds? Please elaborate on how one can make money from crypto with zero investment.