Better money, conditions and lifestyle outside of CX and HK- this is fact.
But when it comes to job security (providing you keep your nose clean) the States is the last place I would ever want to go. The truth is in CX, even during the rough times - SARS/GFC for example, those at the bottom of the ladder didn't lose one second of sleep over their job security. Not many airlines can say the same.
I acknowledge however that for some, things are so dire right now, that going elsewhere is worth the risk. I'm not one of them though
