September is historically the worst month for the bitcoin price, but it may be about to close its best yet . BTC ended September in the red in eight of the past 11 years. This year, it looks set to close the month up by at least 7%, even with today’s swoon. The bullish month puts bitcoin on a strong footing going into October, which, by contrast, is one of its strongest. Where September has seen an average loss of 3.6% since 2013, October has seen average gains of 23%. Some traders are targeting a run to as high as $70,000 in the coming weeks. A green September has always resulted in bitcoin closing higher in October, November and December.