This is particularly problematic once you remember that all Bitcoin transactions are permanent and irreversible. It's like dealing with cash: Any transaction carried out with bitcoins can only be reversed if the person who has received them refunds them. There is no third party or a payment processor, as in the case of a debit or credit card – hence, no source of protection or appeal if there is a problem.
On 3 March 2014, Flexcoin announced it was closing its doors because of a hack attack that took place the day before.[211][212][213] In a statement that once occupied their homepage, they announced on 3 March 2014 that "As Flexcoin does not have the resources, assets, or otherwise to come back from this loss [the hack], we are closing our doors immediately."[214] Users can no longer log into the site. 

The bitcoin-ml mailing list is a good venue for making proposals for changes that require coordination across development teams. Workgroups have been set up to assist developers to coordinate and seek peer-review. For those wishing to implement changes to the Bitcoin Cash protocol, it is recommended to seek early peer-review and engage collaboratively with other developers through the workgroups. 

Though it is tempting to believe the media's spin that Satoshi Nakamoto is a lone, quixotic genius who created Bitcoin out of thin air, such innovations do not happen in a vacuum. All major scientific discoveries, no matter how original-seeming, were built on previously existing research. There are precursors to Bitcoin: Adam Back’s Hashcash, invented in 1997, and subsequently Wei Dai’s b-money, Nick Szabo’s bit-gold and Hal Finney’s Reusable Proof of Work. The Bitcoin white paper itself cites Hashcash and b-money, as well as various other works spanning several research fields.
Josiah is an assistant editor at CCN. A former ancient and medieval literature teacher, he has been reporting on cryptocurrency since 2014. He lives in rural North Carolina with his wife and children. He holds investment positions in bitcoin and other large-cap cryptocurrencies. Follow him on Twitter @Y3llowb1ackbird or email him directly at josiah.wilmoth(at)ccn.com.
While there is certainly the possibility of making short-term profits in Bitcoin, many market participants are viewing an investment in Bitcoin as a long-term play. If the cryptocurrency were to eventually become a favored form of global payment and remittance, there is no telling just how high prices could go. Some have even suggested that the price of Bitcoin could hit $50,000 in 2018 and eventually $1 million.

The use of bitcoin by criminals has attracted the attention of financial regulators, legislative bodies, law enforcement, and the media.[220] In the United States, the FBI prepared an intelligence assessment,[221] the SEC issued a pointed warning about investment schemes using virtual currencies,[220] and the U.S. Senate held a hearing on virtual currencies in November 2013.[222] The U.S. government claimed that bitcoin was used to facilitate payments related to Russian interference in the 2016 United States elections.[223]

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