Earlier quoted context omitted.
Isn't the greater problem that the total market cap of bitcoin is always going to be 22 million? In other words, the single bitcoin I own will always be worth 1/22M of the entire market cap, regardless of how much it's used. And I only own one. There are lost of people out there who owns thousands of bitcoins. 1000 bitcoins is 1/22k of the entire market cap. How could this be sustainable?
If you had 1000 coins in 2010 that cost you 100 dollars, you don't think you're already going to sell out? People can only sell their coins once, and then they are distributed to many, many people.
I certainly have no intention of spending my bitcoin. Not because I don't have anything to spend it on, but because if it becomes more popular, then by definition it will have to increase in value by a huge number. Unless of course it collapses before then.