In my childhood, I saw handing out business cards as being cool and so, I wanted to have one as well. In fact, I created a website on electromagnetism back in school and hosted it on a free domain. It had a quiz at the end (using a little bit of VBScript, if I recall correctly). And I printed out some text on A4 sheets of paper, cut them out, and distributed them to my friends.
After I started working, I’ve been handed over a lot of visiting cards. And I’ve still kept some of them, because you never know who might be helpful in your journey.
Fast-forward to present day: I’ve finally decided to design and print one for me. It’s much easier to connect with people and it builds authority as well. Also, people take you more seriously in events (conferences / meetups).