The US economy has produced multiple new world-changing businesses every decade in living memory. The idea that it's solely coasting on inertia just doesn't make much sense.
Probably, I have only shallow gut feelings about this, but the financial blunders, the changes in education and technological differences around the globe (asia is becoming more and more independant and creative), the very very strange political state.. I'm not sure the thing will hold itself. I have this model where everything is non linear and if you stop claiming your position on the ladder, everything else will evaporate under your feet.
