When I was first clued into Bitcoin I was trying to figure out fun things to do with my GPU. I had a decent one for the time, (laughably small and slow now), and I was telling my then-roommate about SETI@home and how you could search for alien life with spare cycles. He was like "why don't you try Bitcoin?" So I did. Much to his chagrin, as the electric bill was his to take care of. So yeah, basically I wanted to use a lot of electricity and put my computer to work while I wasn't using it. I've been hooked ever since.