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!
Your reasoning that it is not a currency is because it is volatile?
Have you seen the Yen recently? Or how about the NZD?
May 23rd: 103.73
June 13th: 93.80
Today: 100.00