Earning a 20% return in one year is neat. Doing it for three years is cool. Earning 20% per year for 30 years creates something so extraordinary it’s hard to fathom. Time is the investing factor that separates, “Hey, nice work,” from “Wait, what? Are you serious?”

In early days ,Amazon's Profit margins wobbled between negligible and negative. That might be acceptable for a young startup, but Amazon was two decades old at the time. The whole thing was easy to