I believe that it isn't of any profit if we sell BTC when its dropping down , its the fluctuating nature of BTC so the vie would go up and down.
BTC is always growing in long term , one should remember this and see after dropping till $ 3.5 K it is now on $7.3 K .so if someone had converted BTC into their fiats in fear of BTC falling are in a huge loss .the amount that they were holding could have been got doubled in just3 months.