I read an article that was downplaying Bitcoin by saying that their survey showed that bitcoin is used for only about 1% of e-commerce.

Considering world e-commerce is currently at $2 trillion with a projection of $4 trillion in 2020.

1% of $2 trillion is $20 billion. A $20 trillion market cap for bitcoin would be $1,300 per bitcoin. In 2020 e-commerce alone could account for $2,500 per bitcoin and there are many other uses for Bitcoin.