Proof-of-work is a beautiful thing, isn't it? You look at the outcome, and it's immediately obvious what went in. There is no hiding it, no faking it, no way around of actually doing the work. Like a beautiful marble statue. Or a chiseled body after years of working out. The work that went in is immediately obvious at a glance. Hard work. Energy. Scarcity. Related, distinct, and united in #Bitcoin.