I agree with you for long term. The problem is in short term, obviously e-commence companies stocks have been over bought. While going online is definitely the trend, there are much better investment opportunities within those "traditional" dominants in their industries who start shifting business to online. For example, the Ketchup maker said their online business had been growing by more than 100%. With their incredible 97% penetratio rate, the king will still be the king in their own empire. So, in my opinion, stocks like M, KHC, WMT have better investment value than AMZN.
Kraft Heinz laid out its strategy during its investor day, including a focus on efficiency that has already yielded $2 billion in cost cuts
www.marketwatch.com