Someone is massively profiting from these swings. Whether it's MtGox's flaky servers or DDOS or whatever. This isn't the behaviour of a grown-up currency.
I have no doubts in the sentiments of buyers right now but this kind of volatility is getting me worried.
1. Bitcoin exchanges have no daily limits, unlike that of many other financial instruments.
2. By percentage variation, this volatility is significantly smaller then when it was at the 2011-12 bottom.