There are several free ways to get crypto without investment by using money capital, such as learning about Airdrop, Faucet and also campaigns like in the bounties section in this forum. But you also need to know that things that can be obtained for free will not always have such consistent income and even you need a long time to collect them in larger amounts. But those things are not bad for you to try and you can also follow some of the best suggestions that are already in the topic you created because it can be quite suitable for everyone.