I warned people I know of a BTC futures market gap around the 30K mark (very big and clear) when it was trading around 55K. At 65K they told me that sometimes gaps in the futures market don't get filled; I just replied that I have only seen 2 cases in my whole career, both in stocks and because the company got bought up and the stock de-listed. I warned them in good faith..well that gap is filled now and they just texted me with bitter disappointment that they had acted too cocky on their confidence...
NVO