One way to trade the high skew in BTC options (1m 25 dlta BTC put +11% vol vs call) without selling naked option is to buy a put spread where you buy 50 dlta and sell a lower delta put at higher vol. You limit downside and do well if smile flattens (need to manage the theta)
Big drop in implied vol on BTC post halving (1 month from 100 to 80), interesting to note though that the risk reversal skew hasn't changed at a 12 vol premium for the 25 dlta BTC puts vs Calls. This indicates that market still more concerned of a sharp move lower.