http://www.pcgamer.com/nicehash-was-hacked-potentially-for-as-much-as-60-million/

Earlier today, Steam announced that it would no longer be accepting Bitcoin as a form of payment, as the transaction fees had become too great. With Bitcoin having broken the $10,000 mark, and currently sitting at $13,400 (and rising), there's a lot of money at stake. The market cap for Bitcoin is over $225 billion at present, and while many suspect the cryptocurrency is experiencing a bubble, that's a big target for hackers and the like.

I talked yesterday about the potential for GPU prices to go up, as even though Bitcoin can't be (effectively) mined with graphics cards, there are hundreds of alternative cryptocurrencies that can be, and services like Nicehash allow people to lease hashing power on their GPUs and get paid directly in Bitcoin. If you were using the service, I have bad news (with maybe a bit of a silver lining).