I've just been listening to an interview on Agorist Radio with Justin from Voucher-Safe (podcast here http://agoristradio.com/?p=433)
The interview is about what Voucher-Safe tries to solve, and what it doesn't. While talking about gold he mentions that, after the thrill of buying something with a gold-based currency wears off, people rarely use it. Instead they tend to hoard it, keeping it as a store of wealth. A good example of this is http://www.goldmoney.com/ with 1.8 billion in gold, available digitally, that for the most part just sits there as a gold savings account. He then predicts that if bitcoin turns out to be as good as its proponents say it is, it will have the same problem.
Why? Because if a merchant accepts both Bitcoin and Fiat currency people will always prefer to pay with fiat currency simply because the equivalent bitcoin is seen to be more valuable (i.e. $100 woth of bitcoin is > 100$ fiat).
I think this is an interesting point. Thoughts?
The market volume is over 3,000 BTC a day. Someone is spending BTC.