No it is because fiend can mean someone who is obsessed with something e.g. "he is a rock music fiend". At the time I was a bitcoin and cryptocurrency obsessive so it kind of fit. I also envisaged it as a monster in a Manga comic or animation. It's also why I sometimes use the Soul Eater which was an interesting character in an obscure Manga I randomly came across via a GF who was into that sort of thing.