None of my intelligent (130+ IQ) friends use cryptocurrency regularly. They only use it selectively and rarely, e.g., at a conference or buying drugs, but almost never trade or invest in it spontaneously in their own time. This has been a long-term consistent observation, but today confirmation came. A new meta-analysis showed time spent holding cryptocurrency per day increases exponentially with lower IQ, with drop-off to near 0 days at 145+. Cryptocurrency is mostly appealing as a way to fill an otherwise vacant mind that has no interesting thoughts and minimal goal-directed behaviour. Intelligent people find stimulation from thinking about real-world problems and making a tangible difference to the world, not from speculating on volatile digital coins like some sort of day-trading lemming.