No forced selling of BTC, only forced selling of SD shares. Some people are theorizing that the large BTC payout led to the drop in exchange rate, but that doesn't make a lot of sense to me. The alternative view is that a BTC company was just sold for a significant sum showing that the BTC economy is thriving.
Small market. That is a huge amount.
People will be selling to make profits causing the charts to look negative. People panic and sell.
I agree with the concept that the amount of BTC being dispersed is large enough to effect the exchange rate. However, I think it is a leap to assume that these investors will be selling to take profits.