Only China and the US are capable of self sustaining their economies.  Size, technology, industry, market and infrastructure.  That's why both countries have small percentages of export GDP and the rest of the GDP are all domestic.  Both can decouple with serious consequences but both are to integrated to avoid the high cost of decoupling.

Countries like Australia, Canada, New Zealand, Germany, France and others have sizeable export GDPs and are very sensitive to economic disruption due to trade.  Australia just got too big headed thinking Uncle Sam is going to buy all its stuff and play the almighty Anglocentric supremism game.  

India has the size but nothing else.  Has the economy of Sub-Saharan Africa and now got caught into US trap of competitng with the big boys.  It is like a stupid poor boy with delusions of grandeur hangs out with a rich boy, now thinks he is rich and wants to compete with other rich boys.  Pretty soon, it will run out of money to even buy food.