Or they've got a moat. Warren Buffet likes moats. If your potential competition is stymied by huge costs of startup or catchup, or you've got the government (b

Or they've got a moat. Warren Buffet likes moats. If your potential competition is stymied by huge costs of startup or catchup, or you've got the government (be it national or local) on side to help you maintain a monopoly or cartel (I'm looking your way, numerous US internet service providers...), then your high margin can exist for a very long time. I don't know if I'd like to say "indefinitely" but with the right moats, yeah, maybe indefinitely.