Dear Bungie, I state this topic in hopes that it could come true one day. I know a trading system would break the game. Everyone would get the gear and weapons they want but what if there was a trading system and you could only trade (as the topic stated) engrams, motes of light, and strange coins. I think this would be a cool way for players to trade to get motes of light for that engram from xur or strange coins for the gear. You still keep the players working because you need to grind to get the items to trade, and it would keep the currency relevant because theres alot of other players that just dont spend them. This is just my opinion and if you could reply to it I would love some criticism on this idea.