Weed may not have an effect on IQ or memory (which I still don&#x27;t completely believe), but it sure has an effect on ambition.<p>I&#x27;ve seen so many smart people over the years sitting at home after work and smoking out almost every day.  When they weren&#x27;t smoking, they were talking about smoking.<p>I actually didn&#x27;t mind it too much, because it gave me a competitive advantage. I got better pay, better jobs, and the time they spent smoking, I spent on my startup (which is now a company with employees).  It&#x27;s also a time and money sink.<p>I knew a guy that could barely afford rent, had almost 100k in student debt, and worked a job barely over minimum wage.  Yet, he always had the money to spend on weed (nearly $1000&#x2F;month).  I should have been a dealer.<p>I even tried to start a business with a friend of mine that I knew smoked every day.  We are still friends, but never got our business off the ground. I was always waiting for him to complete something.<p>Anything in moderation is fine.  With weed, it just seems to be one extreme to the other.