Bitcoin BTC$67,017.98 rose to test $67,000 early Friday and was quickly rebuffed, though it remains about 1% higher since midnight UTC with ether ETH$1,957.99 rising half as much. The derivatives market, too, is showing signs of positivity. The CoinDesk 20 Index (CD20) is little changed, up just 0.7% in the period. While the gains mark…