I don't know if it's a curse on the BTC price itself or a curse on traders who ramp up leverage, overconfident that every September will be a "red" month. Yet, looking at historical price action, BTC has actually shattered that perception several times in recent years.
As for the visualization, whether it's a chart curse or a portfolio curse, the two don't always go hand in hand.
Although i have not experienced or notice that every September of the year, Bitcoin investments do experience a decrease in the price market more than any other months and i don't really think it is a curse but I'm just feel like Bitcoin is just displaying some part of its behavior in the market for all investors to be aware of every September but since Bitcoin is beyond every investors imagination of knowing what Bitcoin can be in the market, let us vividly watch what Bitcoin price will come, from now till September ending because we experience an increase in Bitcoin towards August ending.