Its true that Amazon, Ebay, FB accepting BTC is good for publicity, which will in turn boost the demand and push the price. But, I believe, these are no good for BTC in long run. Coz these companies are not going to hold BTC. As soon as they get it, they'll convert it and large dumping on exchanges will begin. Imagine, Amazon dumping its daily BTC sales on an exchange. Supply will surpass demand taking down the price.
So, I think, Amazon, Ebay & FB like companies, that would like to operate on BTC can really take Bitcoin forward... and we should build them.
What do u think ?
This is a very valid point u have raised IMO. Bitcoin is a boon to modern entrepreneurs. It is evident that the established ones like Warren Buffet wont like it, but the rising ones like Winklevoss will. Rise of BTC means fall of Buffet's wealth, whereas it is reverse for Winklevoss. I hope the new age entrepreneurs find the true value it and realize it is more profitable than a short term Pump-n-Dump scheme.