Trading is an EXCELLENT idea....However.....it would ruin the randomness of the system which would then break the game. If you're like me...I've been insanely lucky with exotic bounties....and with most things but I've missed a couple good things. I am missing exotics and wish I could get them. I'm on Raid Teams with people that get what I'd like to get and I get nothing. Trading would solve this...but it would also remove the insanity of RNG which would then make the game far too easy. They (Bungie) won't allow it. I think it's a great idea...but I can also see why it will never happen.