system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do people create computer viruses?
gpt
Lots of reasons.  Originally, back in the day, it was simply to do it.  It gave the author a feeling of power and/or accomplishment.  Sometimes it is motivated by the same things that motivate any vandalism.

These days it is more and more profit driven.  Malware is a huge business now, bringing in billions of dollars to the perpetrators.