My buddy's dad tried to convince me to get into bitcoin back in 2012, and he introduced me to the basics of mining. The specs required of your computer were pretty intense/expensive and at the time I couldn't justify spending thousands on something that could be worthless. Nowadays, I facepalm when I look back and see that investment as a drop in the bucket.
I've been messing with Amazon FBA lately and it's funny to see that on alibaba.com the hottest selling items are computers used for mining Bitcoin. Who woulda thunk it'd become such an industry.