I’ll admit to being slow to understand what this “420” thing was about. Slow as it started in the 1970s in California. Because that’s what time each day a group of teenagers allegedly met to smoke pot. Decades later, with marijuana legal in 24 states for recreational use, and in 40 more for medicinal purposes, the “420” crowd has come a long way. None other than Tesla (TSLA) CEO Elon Musk has repeatedly invoked 420 in social posts. Most notably back in 2018, when his message was simply “Am considering tak ...