No you cannot. One way or another, you have to sacrifice something that is other than money, which is your time, dedication, skill, and patience.

When I first started my BTC career back in 2017, I remember that I had to read hundreds of posts in order to grasp the bigger picture in cryptocurrencies. I also watched some videos explaining the fundamentals and basics of the blockchain technology and on how you can apply it practically. Once I was able to at least get the message, that is when I started participating into campaign signatures which provides a weekly payment of BTCs.

While I did not use any capital or initial investment of money, what I invested is my time and effort in order to know and understand the basics of BTC and cryptocurrencies. So at the end of the day, investing does not only involve money, but also some intangible things which is relevant in understanding BTCs.