BitCoin is NOT a currency. Any business is rolling the dice accepting BitCoin with how volatile the price is. With how rapid the price swings (mostly down), no logical business would/should accept BitCoin. No different than gambling. To my knowledge my dollar last week is still a dollar today, not true with BitCoin, you would have taken a hefty loss this week only!
I agree with this somewhat but if you run a firm that derives most of its revenue from fees then it should be relatively easy to adjust the fees as the price fluctuates. If I operated a bitcoin orientated business and dealt only with BTC then I would definitely be taking more notice of the value in USD or the value in USD after fees for withdrawing etc. Rather than the value in BTC alone, as it is not a very recognised currency and you can't use it to pay for important things like food, petrol or utilities. If these firms are smart then they would have already planned or have experience in how to deal with high price volatility.