In a situation whereby you accept it as a means of payment while selling off your goods, then when you are out of stock, so you decide to restock your shop, so by then price of Bitcoin has dip so much that you can't buy all the goods needed in your shop, due to the fact that your money has depreciate in value because of the dip, what is the way forward in such a situation if your emergency funds can't cover up for the shortage?
Agreed that it's also created as a means of payments but holding it is very important to an individual and as well a business man but looking at the area of buying goods with it as it's not been converted to a simple fist currency could be very challenging and you need not to be in a rush. Mind you you can choose to purchase the goods in the shop by waiting awhile when everything goes down but again you can as well convert to another easier currency inorder to make payments. This is why it's advisable to have a third party funds that you can run to at anytime when such issues occur, having backup funds usually be of help in this situation do it depends on your decisions.
Not 'also', because that sounds that the currency use of BTC is only secondary, when in fact it was main. People who hold a BTC can have two reasons. One does it for investing, while the other is idling it for a while, for later use. Each BTC feature has their own importance but even without a BTC, it is still possible for us to live and there are people who are not even in BTC yet but still does well in life.
There are also people whose life was ruined by BTC, though it is also their fault on why it happened. BTC is now known and like we said earlier it is a currency, so we can just use it directly. I agree that it's important to have a backup fund (preferably fiat), since it was physical and ready to use anywhere.