Is there any point to worrying about gold chests when you are leveling up your alt? I've just been skipping them since I don't recall that there's anything decent in them anyways.
The ones on earth are generally worth it, most of them are on the routes for the story missions (one at the boss of the strike), and they all have green gear, then the 5th one has an upgraded sparrow. The only other one worth mentioning is the 4th chest on mars (meaning the 4th one you pick up, not specific to a location) which has a strange coin.