Maybe this question has already been answered but I can't find it (and honestly I find hard even to follow my own questions).

If I have an ecommerce of computers and I sell "X" at 1000$ everything is fine.
But if I decide that you can buy it with bitcoins, 1.71 bitcoin (todays 1000$), how can I adapt this price to TODAY bitcoin value? Maybe tomorrow it would cost 1.80 and, a week 2.5 bitcoins and months after 0.5 bitcoins.
I would go mad!

If I block the bitcoin alternative if the price goes crazy, wouldn't my business make angry customers?