Bridge

Keep your goals away from the trolls.

~ Peter McWilliams

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In the Three Billy Goats Gruff, I think we need to acknowledge that the troll was ahead of his time situated as he was in a Norwegian folktale.  He wanted to charge people to use his bridge.  And we do that now - toll bridges (as opposed to "troll bridges") and toll roads and Tollhouse cookies.  Of course, thus far we don't charge people their lives to use these things. 

In that way the troll's thinking is a bit antiquated.  And doesn't really lend itself to long-term sustainability / income / wealth generation.  But trolls are known to live kind of hand to mouth.  Or hoof to mouth if they are goat-eaters.  Which can lead to aphthae epizooticae.