Magic: The Gathering is on pace for $2b this year and has compounded 17% a year for 17 straight years. The whole thing came from marbles. Richard Garfield grew up in Bangladesh and Nepal, didn't speak the language, and made friends through marbles. Every kid brought their own collection, and you could win or trade each other's marbles. His insight: every game before Magic came in a box with fixed pieces. What if players brought their own collection to the game, like marbles? That insight did…