SR uses the MtGox 24 hour average. In 12 hours, with the MtGox price stuck at $120, it will be close to $120. When trading resumes, who knows what will happen, but even if the BTC price plummets, the 24 hour average will drop much more slowly. See, everybody was complaining about how the SR price lagged behind the actual price when it was booming, but now you can understand the advantage of it. Even if BTC price will be $50 tomorrow, your coins will be worth over $100 on SR.