In my opinion when the market is down like right know Im not going to spend it my crypto unless using if for daily purposes like withdrawing the crypto for a monthly bill. the best time when the market is down is to accumulate more coin and token stake it and enjoy when the bullish month coming.
Bitcoin has high price volatility, the best option when the price drops is to hold it as much as possible and it is better if you can accumulate it by placing more investment in it. There is good hope about its future and you may regret it if you sell it today.
By the way you can still refrain from selling your bitcoins during a downturn in case you still have savings or perhaps sell your other investment assets like gold or something or or a myriad of used plastic if you've been saving it. I prefer to hold bitcoin over selling them during a downturn and I tend to look for logically better options to sell.