Nice Hash a mining, buying and selling Bitcoin platform was hacked today for an estimated $62 million or 4,736,42 est Bitcoin. After NiceHash was down for Maintenance this post came hours after:

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Offical press release by NiceHash

"Unfortunately, there has been a security breach involving NiceHash website. We are currently investigating the nature of the incident and, as a result, we are stopping all operations for the next 24 hours.
Importantly, our payment system was compromised and the contents of the NiceHash Bitcoin wallet have been stolen. We are working to verify the precise number of BTC taken.
Clearly, this is a matter of deep concern and we are working hard to rectify the matter in the coming days. In addition to undertaking our own investigation, the incident has been reported to the relevant authorities and law enforcement and we are co-operating with them as a matter of urgency.
We are fully committed to restoring the NiceHash service with the highest security measures at the earliest opportunity.
We would not exist without our devoted buyers and miners all around the globe. We understand that you will have a lot of questions, and we ask for patience and understanding while we investigate the causes and find the appropriate solutions for the future of the service. We will endeavour to update you at regular intervals.
While the full scope of what happened is not yet known, we recommend, as a precaution, that you change your online passwords.
We are truly sorry for any inconvenience that this may have caused and are committing every resource towards solving this issue as soon as possible."

NiceHash uses "Hot wallets" these are wallets that are based on the money you have on the site. For example NiceHash's Vault which contains all of users money was opened and taken by an unknown person. NiceHash keeps all their funds in this "storage" and gives users money when they have earned it from buying, selling or mining. These types of wallets are more insecure then "Cold Storage". When the site NiceHash is hacked for their "vault" it effects everyone. Cold Storage is when you store bitcoins on your physical machine or on a hard drive.




Hackers bitcoin address where these stolen funds are now kept. (account only holds about $860,000 worth of funds) In my opinion these hackers are splitting up their profits and getting the coins ready for cold storage. splitting up the coins make them much harder to track and in cold storage these coins can be held until the price rises more or until the hacker wants to sell them.
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Since the hack Bitcoin has risen $2,000 (per 1 bitcoin)

Here is an example of the amount stolen Look at Total Recieved:
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Nice Hash Main Hacker Address Displaying 4,736 Bitcoin stolen
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Sources:
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