Ok so me and some friends have talked about this and we think they're should be a way to trade in motes of light for strange coins. I figured since you get 3 of them every time you rank up then it would be 3 motes of light for 1 strange coin. Since there's really no great way of getting them then there should be a way to trade something for the strange coins. Let me know if you agree with this or not and if you do then try to bring this idea up with your friends. Who knows, maybe we can get bungie to do it