Bitcoin historical monthly perfomance
Statistics on Bitcoin’s monthly income demonstrate that the only loss-making month was January, in contrast to November, which was the most money-making.
Returning to the issue of long-term investment, I found curious statistics on Bitcoin's monthly returns. The only loss-making month on average was January (a drop of only -0.18%). The most profitable month in history was November, with an average growth rate of +75%.
The eleven of 12 months at a long-distance show profit.