Because of the skill tree configuration, SWG ensures player interaction. This is not something that can be played solo. You may be solitary, but you will never be able to survive without some interaction with other players. The game has a guild system and the free enterprise structure is such that players can unionize and drive independents out of business through cut-rate prices. No one will truly corner the market on something, but they can make it tough for other players to rake in the credits (money).