Dang... that's rough.
From what I have heard over time, holding Bitcoin hasn't particularly been a smart business decision thusfar. The currency is always fluctuating, and since many businesses didn't begin looking into Bitcoin before the coverage it got in late 2013, a majority of businesses have only been around to watch it drop.
Writeoffs due to currency fluctuations are the norm. Until there's a robust swaps market, that's just the way it is. Plenty of people are just fine from 2011, so I'd take issue with your rather generalized "from what I've heard over time" remark. Most smarter businesses convert immediately until they have confidence either in their predictive projections or factor it into their business model. The potential is still huge, so some drawdown is completely tolerable.