Legally?..Meth is only popular in midwest and among the gays. White boys on the coasts/south prefer cocaine/crack. So if you really wanna ruin some white peoples lives? Buy a brick and find some white customers.
Also breaking bad is absolute bullshyt. You could never cook high quality meth inside the united states and compete with cartel prices. There would be like no profit margin. You would be risking your ass just to get the chemicals. Not worth it. Better to just buy a few pounds from your amigo on the other side of the boarder, stuff it in a white girl, then come over here and make profits.
fukk all of the above though. What black people really need to get involved in is pharmaceuticals. Kill them mofos legally while breaking their pockets.