Yesterday while H&M was being mobbed by people who didn’t get any of that Balmain stuff, Olivier Rousteing was jumping up and down on his bed tossing dollar bills in the air like he just didn’t care. Because he didn’t. He never did and he never will. “Come peasants, line up to get my cheap knockoffs while I selfie with the celebs who got paid to sport this scratchy crap on IG while drinking loads of champlagne (that’s drunk for champagne)…