[dohko]

You understand how currencies work, right? On one end of the trade there is a person that buys and the other a person that sells.

Even if what you said were true (That bitcoin has mainly being flunctating upwards), then the people selling things in bitcoins are actually losing on the trade.

What do you think the result of that is going to be?

Goods sold in bitcoins are going to be really unstable and sellers are going to be disincetived in selling them (or they'll just charge a premium for them - making them more expensive than if you paid for them in dollars).

The point is, that a currency flunctating a lot, even if mainly upwards, is not a really good thing. From a speculator perspective, volatility is a great thing, but not for everyone else.