The only way to beat a grappler, is to be a grappler. Bjj is also great for street fights. If bjj can beat a taekwondo fighter or muay thai fighter who actually knows how to strike, imagine what it can do against someone who doesn't know how to even jab. Someone in mma might be watching for someone to shoot for a double leg, but some thug on the streets isn't even gonna think about that. For multiple attackers it is also good as well. A little over half of it is on the ground rest is standing