Bitcoin Hovers Near $8,000 Level as Investors Weigh Twitter Ban Bitcoin swung between gains and losses near the $8,000 level, paring an earlier rebound, as investors digested the decision by Twitter Inc. to ban advertisements for initial coin offerings and token sales on its service. The largest cryptocurrency traded flat at $7,847.87 as of 11 a.m. in Hong Kong, according to consolidated Bloomberg pricing. The digital currency had earlier jumped as much as 4.8 percent, reversing an overnight decline that…