open ended question... flame away. We assume (probably correctly so) that boxing and grappling are probably the best way to defend yourself. Let's say you went the grappling route, namely picking up brazilian jiujitsu as your primary art instead of judo or sambo or wrestling. At which point in your jiujitsu career do you think a practicing jiujitsu player is proficient at defending themself against random encounters (people not trained in any arts?) one on one encounter in the middle of the streets with no one to interfere. This is not a knock against any other arts, just a question in which level of jiujitsu would someone be able to properly defend themself against an attacker (that isn't high on drugs or armed). Do you think a high white (3rd/4th stripe white) or blue, or even purple?