The worst month in Bitcoin's (BTC) history could be its best yet, with the asset on track to gain at least 9 percent this September, breaking a trend that has seen it close with losses eight times since 2013. This puts the asset on a firmer footing in October, the start of a generally bullish period, with some traders targeting a rally from the current $64,000 level to $70,000 in the coming weeks. A green September always leads to bitcoin closing higher in October, November and December. Compared to September, there have only been two Octobers since 2013 when bitcoin closed with a loss - a gain of as much as 60 percent and an average gain of 22 percent.