There was a "crash" of a similar size a month ago. And another, a a little smaller, a couple of weeks before that. Someone needs to pay more attention :-)
That being said, I am expecting a proper crash at some point soon. I don't think this is it, though.
After the big run up in early June, it looks like bitcoin prices in USD are drifting back towards 19. Today was a high volume sale that briefly dipped to 20, then back up to 24 within the hour.
Given that spot market prices can be very volatile, I think we need real-time bitcoin price widgets where ever goods are priced in bitcoins, or a futures market in bitcoins to provide stable-for-some-time-period prices for miners and actual users.
Investing in Bitcoin is like investing in the stock market, but with none of the protections, oversight, or the experience to know not to repeat some of the same mistakes as let's say...the 1930s.
Ok, but this lack of regulation could equally well make for some spectacular opportunities to get rich (or poor) quick, in a truly adrenaline-pumping style, which the current stock exchanges lack nowadays.
I should pay more attention to the prices for bitcoin. I bought $10 worth back when they were roughly $1/btc. If these things are getting up to the high 20s in USD, its turning into a good investment. Should have bought more back then, but I didn't think it was going anywhere.
That being said, I am expecting a proper crash at some point soon. I don't think this is it, though.