Not yet. When he gets that big fight in the states and becomes box office, people won't be able to duck the money. He's close to it now.
If I were him, I'd take on Saunders (an easy fight - decent little technician, but no power and stamina issues) to pick up another belt, then look to the big USA fight.
Until he's in an elite level fight and dominates, I'm not on board the hype train with GGG. I'll recognise him when people stop ducking him (again, I know that's not his fault, but it's still the case that he isn't fighting big fights at that weight) and he beats them soundly.