THERE IS NO METH CAPITAL OF THE WORLD.
Everyone is claiming that shit - everyone. If I wanted to (which I dont, because meth is the dirtyest drug out there...), I could score methamphetamine in nor cal, so cal, missouri, switzerland, japan, fucking probably antarctica. Meth is not very hard to make and there are hundreds of suppliers per city. Capital my ass. A capital would imply that it was the 'main' source of a substance, which exported to areas around itself. There ain't none of that with crystal, its almost ALWAYS local. Even in my small ass town back home, it's all bought locally.
Anyway, fuck that shit. I do drugs. But I don't do meth.