Like all common RPGs and mmos, whoever gathers the most resources, (exp, gold, loot) becomes the strongest. If Destiny was in any way similar to an mmo, then i'd say that the farther out you go the harder it gets. Now with that being said, I would go somewhere on a low level planet ahead of the crowd so I can mega-farm. By the time others arrive, i'll have enough resources to move on. I'm sure Bungie has thought of this already and put in some kind of countermeasure.