If there's one thing that's true about the word "blockchain", it's that these days people have strong opinions about it. Open your social media feed and you'll see people either heaping praises on blockchains, calling them the saviors of humanity, or condemning them as destroying and burning down the planet and making the rich richer and the poor poorer and generally all the other kinds of fights that people like to have about capitalism (also a quasi-vague word occupying some hotly contested...