Only when the price is going up. When it was crashing a few days ago, you could buy BTC for $120 but the weighted average on SR was like $180. Right now, BTC is trading at $107 and the SR price is almost exactly the same, because it has been higher for the last few hours, around $115, but between 20-24 hours ago, it was much lower. Wait 4 hours and the SR average should go up, and if the current price is still around $107, you will get more than what you paid for your BTC (if you bought them right now).