A cryptocurrency (or crypto currency) is a digital asset designed to work as a medium of exchange that uses strong cryptography to secure financial transactions, control the creation of additional units, and verify the transfer of assets.[1][2][3] Cryptocurrencies use decentralized control as opposed to centralized digital currency and central banking systems.[4]

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Vaak wordt een proof-of-work-schema gebruikt voor een systeem van consensus op basis van rekenkracht dat bescherming moet bieden tegen manipulatie en vervalsing. Er worden vaak meerdere transacties verwerkt in ieder blok (bij bitcoin bijvoorbeeld per blok alle transacties in een tijdsinterval van ongeveer 10 minuten, dat zijn er ongeveer 3000 in december 2017[5][6]). Zodra een blok gevonden is wordt het openbaar gemaakt. De andere nodes controleren het, en de nodes gaan op basis hiervan en van de inmiddels nieuw uitgevoerde transacties beginnen met het zoeken naar weer een nieuw blok. 

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Many uses have been proposed for Ethereum platform, including ones that are impossible or unfeasible.[46][33] Use case proposals have included finance, the internet-of-things, farm-to-table produce, electricity sourcing and pricing, and sports betting. Ethereum is (as of 2017) the leading blockchain platform for initial coin offering projects, with over 50% market share.
In the end, the majority of the Ethereum community voted to perform a hard fork, and retrieve The DAO investors money. But not everyone agreed with this course of action. This resulted in a split where two parallel blockchains now exist. For those members who strongly disagree with any changes to the blockchain even when hacking occurs there is Ethereum classic. For the majority who agreed to rewrite a small part of the blockchain and return the stolen money to their owners, there is Ethereum.   

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Cryptocurrencies are experiencing a moment of unprecedented attention and speculation for several reasons. 1) The value of Bitcoin has been steadily climbing through 2017, with Ether seemingly poised to overtake the cryptocurrency giant any day; 2) Blockchain technology has purposes above and beyond cryptocurrency, and has been hailed by some as the backbone of the future financial system; 3) The increasing number of people who see cryptocurrency as a form of investment similar to gold. If cryptocurrencies stabilize in value, buying Bitcoin or Ether has the potential to be a worthy venture. 

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Ethereum provides a decentralized virtual machine, the Ethereum Virtual Machine (EVM), which can execute scripts using an international network of public nodes.[4] The virtual machine's instruction set, in contrast to others like Bitcoin Script, is thought to be Turing-complete. "Gas", an internal transaction pricing mechanism, is used to mitigate spam and allocate resources on the network.[4]

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Due to the high number of new requests the answering of the support ticket is delayed. We are working hard to reduce the number of open tickets. We would like to ask you not to provide multiple tickets for payouts. All tickets will be read by support and will need to be processed. This only prolongs the time it takes to answer the tickets. Payouts will still be made on an ongoing basis. Due to the instances in the past, these will be checked carefully before the release, which will delay the payouts.
In February 2019, Coinbase announced that it had acquired "blockchain intelligence platform" Neutrino, an Italy-based startup, for an undisclosed price.[33] The acquisition raised concern among some Coinbase users[34] based on Neutrino founders' connection to the Hacking Team, which has been accused of providing internet surveillance technology to governments with poor human rights records.[35] On March 4, 2019, Coinbase CEO Brian Armstrong said his company "did not properly evaluate" the deal from a due diligence perspective and thus any Neutrino staff who previously worked at Hacking Team "will transition out of Coinbase."[36]

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