I think it will just take time. The market depth and volume are way too small still.
I think what happened is that someone who cpu mined for a month in 2009 sometime, made 20k btc and forgot about it, had heard on the news about the popularity explosion, decided to sell all while it lasted and made quarter to half a million usd. Basically that brought the price from 25 to 15 and because a lot of people that pissed their pants in the aftermath it went on to 10. Just look at the volumes, essentially it was all one big sale on saturday.
It will just take time until people from the early times have cashed in their stashs until the price becomes more stable.
It's hard to withdraw sums that big. The bank is required to alert the authorities for wire transfers that large.
Tux will increase your limit if you send in ID with picture, but probably not that high.
Even at 9k per day (pretty optimistic) it would take 2 months just to withdraw 0.5m, and then you'd better have a corporate bank account or spread the withdrawals among 10-20 private accs.
You can't just "strike it big" with bitcoin and expect to get easy money.
Getting large sums out of the system is going to be very difficult if you want to stay under the radar. At the least you are going to have to spend a lot on plane tickets to open bank accounts in various countries where foreigners can do so legally.
