On a purely technical level, because I mined some, back when doing so was still profitable for an average person. I thought the governments would quickly ban it, and it would essentially go to zero, so I bought stuff from webshops that accepted it (some of the stuff I still use), but I saved a little bit just in case. Which of course turned out to be a good thing.

I'm not as convinced as most of you that it will survive for a long time and appreciate extremely much more, but I didn't pay that much for it, so I might as well hold on to it, or at least most of it, "just in case it catches on". If it actually becomes the money of the world like most people here think, I wouldn't want to be without, and I'm not the kind of person who likes to have flashy things etc., I never was, and I have a job, so I don't see any immediate want or need to spend it.

I have also mined a little bit more with old tech that works well as a space heater.