Well BTC stayed relatively stable while BCH has pumped thus far, the combined value is above $3500 now. Many people expected BTC price to drop after the coins were paid out but the only thing that happened was the general alt market pumped, I guess because no one sold for fiat and only traded their BTC for altcoins.
Not sure what you are looking at but it dropped from $2900 odd to almost the $2500, rebounded to the $2700's and back under that now. That's not remaining stable. Also after the BCH pump and dump it has dropped slightly, not gained. Considering everyone was saying they were going to dump their BCH for more BTC then it should be up over $3000, what did they do with their BCH takings?
Maybe now Polo is back BTC may move but it hasn't yet and you would think people would be hesitant to use Polo again anyway.