This is an update to previous chart (linked). I am looking at strikes between 250-280, 18Feb expiry. Price should drop into "buy zone" if cryptos crash (this week).
The red dotted line is also marked on previous chart. I think buyers will rush in and move price back over the line, and I do not know if price will actually come all the way down into the buy zone. So if on 30m chart I see signs of bottoming or trend reversal, I will buy a small call position. 18Feb expiry - using less capital - gives me time and comfort to hold for an upwards reversal.