CS seems to be no big deal. I don't think we use gold for much in game anyways, just repairs and teleports, some crafting stuff which doesn't do much either....so use your gold to buy CS items if you want.
Mystic box cant be a big deal, theres no meaningful items in GW2 to aquire.
Res stone doesnt work in pvp, so thats small potatoes too.
So everyones just going to buy a couple bags/bank slots, and use extra gold to buy magic find CS items.