I have not been using Coinbase long but I have used it long enough to feel like I’m getting burned. I am using Coinbase as, what I call, a pass through as in the end, I am purchasing crypto that is not supported by Coinbase with the BTC I purchase through Coinbase. While the app itself is great as it is easy to navigate the process of withdrawing funds is not so great. I purchased BTC with the intent of withdrawing to purchase another crypto. A week and several emails later my BTC has not yet been released for withdraw. Prior to this transaction I had done several others successfully with no issues, now, for no reason whatsoever my funds are pended for “further research”. I am a patient person but as I’m sitting here waiting the BTC value is falling and the cost of the crypto I am looking to purchase is rising which means at this point I have missed out on a few hundred dollars of profit all because Coinbase won’t release my funds. I am giving only 1 star because (1) communication with Customer Service has not been great as I am still sitting here clueless on what’s going on and (2) I’ve missed out on significant profit and have no idea why or have any sense of comfort that this won’t be an ongoing issue

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The platform stores 98% of customers funds offline to ensure the security of the cryptocurrency assets you purchase and store within Coinbase. On their website, Coinbase assures customers that "sensitive data that would normally reside on our servers is disconnected entirely from the internet." Data is then encrypted, and transferred to USB drives and paper backups, and distributed in safe deposit boxes vaults all over the world. 

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When people talk about the price of Bitcoin, they are referring to the current price at which Bitcoin is changing hands. Since Bitcoin is a purely speculative asset, this price is determined by how little sellers are willing to charge and how much buyers are willing to pay. Even then, the price of Bitcoin can vary across exchanges like Coinbase and Binance or currencies because of market inefficiencies

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On February 16, 2018, Coinbase admitted that some customers were overcharged in error for credit and debit purchases of cryptocurrencies. The problem was initiated when banks and card issuers changed the merchant category code (MCC) for cryptocurrency purchases earlier this month. This meant that cryptocurrency payments would now be processed as "cash advances", meaning that banks and credit card issuers could begin charging customers cash-advance fees for cryptocurrency purchases. Any customers who purchased cryptocurrency on their exchange between January 22 and February 11, 2018 could have been affected. At first, Visa blamed Coinbase, telling the Financial Times on February 16 that it had "not made any systems changes that would result in the duplicate transactions cardholders are reporting." However, the latest statement from Visa and Worldpay on the Coinbase blog clarifies: "This issue was not caused by Coinbase."[45]
         划分子网可以缩小广播域,减少广播风暴对网络的影响。路由器每一接口连接一个子网,广播报文不能经过路由器广播出去,连接在路由器不同接口的子网属于不同子网,子网范围由路由器物理划分。对交换机而言,每一个端口对应一个网段,由于子网由若干网段构成,通过对交换机端口的组合,可以逻辑划分子网。广播报文只能在子网内广播,不能扩散到别的子网内,通过合理划分逻辑子网,达到控制广播的目的。由于逻辑子网由交换机端口任意组合,没有物理上的相关性,因此称为虚拟子网,或叫虚拟网。虚拟网技术不用路由器就解决了广播报文的隔离问题,且虚拟网内网段与其物理位置无关,即相邻网段可以属于不同虚拟网,而相隔甚远的两个网段可能属于不同虚拟网,而相隔甚远的两个网段可能属于同一个虚拟网。不同虚拟网内的终端之间不能相互通信,增强了对网络内数据的访问控制。

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In 2014, the company grew to one million users, acquired the blockchain explorer service Blockr and the web bookmarking company Kippt, secured insurance covering the value of bitcoin stored on their servers, and launched the vault system for secure bitcoin storage.[12][13][14] Throughout 2014, the company also formed partnerships with Overstock, Dell, Expedia, Dish Network, and Time Inc. allowing those firms to accept bitcoin payments.[15][16][17][18] The company also added bitcoin payment processing capabilities to the traditional payment companies Stripe, Braintree, and PayPal.[19]

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I have not been using Coinbase long but I have used it long enough to feel like I’m getting burned. I am using Coinbase as, what I call, a pass through as in the end, I am purchasing crypto that is not supported by Coinbase with the BTC I purchase through Coinbase. While the app itself is great as it is easy to navigate the process of withdrawing funds is not so great. I purchased BTC with the intent of withdrawing to purchase another crypto. A week and several emails later my BTC has not yet been released for withdraw. Prior to this transaction I had done several others successfully with no issues, now, for no reason whatsoever my funds are pended for “further research”. I am a patient person but as I’m sitting here waiting the BTC value is falling and the cost of the crypto I am looking to purchase is rising which means at this point I have missed out on a few hundred dollars of profit all because Coinbase won’t release my funds. I am giving only 1 star because (1) communication with Customer Service has not been great as I am still sitting here clueless on what’s going on and (2) I’ve missed out on significant profit and have no idea why or have any sense of comfort that this won’t be an ongoing issue
If you do have this much money tied up in Bitcoin, though, you may want a more secure space to store it. If this is the case, Coinbase offers a Coinbase vault, which has time-delayed withdrawals (giving you 48 hours to cancel a withdrawal) and the option of multiple approvers, increasing security by ensuring that all withdrawals are approved by multiple people. They also offer a multisig vault, which is basically an even more involved and more secure vault, requiring multiple keys to unlock. 

When people talk about the price of Bitcoin, they are referring to the current price at which Bitcoin is changing hands. Since Bitcoin is a purely speculative asset, this price is determined by how little sellers are willing to charge and how much buyers are willing to pay. Even then, the price of Bitcoin can vary across exchanges like Coinbase and Binance or currencies because of market inefficiencies

为什么比特币不是安全


Status of the Bitcoin network as of Sunday, October 06, 2019 at 12:00:02 EST: Total bitcoins: 17,976,946.044972 Height: 598,162 Difficulty: 12,759,819,404,408.789062 Statistics for the past 24 hours: Number of blocks mined: 147 Total bitcoins output (amount sent): 496,102.022565 Total fees: 16.449356 Average time until block found: 9 minutes, 47 seconds Estimated hashrate: 93,241,227,233.279419 gh/s Current […]
don’t use coinbase. They held my funds and I couldn’t use my bitcoins until their value dropped by 1/4. this company is awful. I verified my ID, bank account, email, and everything and they lied and said initially it takes 3-4 days for funds to be available. once the bought the bitcoin they said it will take one week. and that is still a lie because after one week the funds are NOT available. liars !!!!

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With the largest variety of markets and the biggest value - having reached a peak of 18 billion USD - Bitcoin is here to stay. As with any new invention, there can be improvements or flaws in the initial model however the community and a team of dedicated developers are pushing to overcome any obstacle they come across. It is also the most traded cryptocurrency and one of the main entry points for all the other cryptocurrencies. The price is as unstable as always and it can go up or down by 10%-20% in a single day.

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In April 2019, a UK corporate filing stated that Coinbase's non-U.S. revenue grew 20% to €153 million (U.S.$173 million) in 2018 resulting in a net profit of €6.6 million.[37] Coinbase UK CEO Zeeshan Feroz said the company's non-U.S. operations accounted for nearly one-third of the company's overall revenue and Reuters estimated that the company's global revenue totaled "around $520 million" in 2018.[38]

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Coinbase was founded in June 2012 by Brian Armstrong and Fred Ehrsam.[6][7] Blockchain.info co-founder Ben Reeves was part of the original founding team but later parted ways with Armstrong due to a difference in how the Coinbase wallet should operate.[8] The remaining founding team enrolled in the Summer 2012 Y Combinator startup incubator program. In October 2012, the company launched the services to buy and sell bitcoin through bank transfers.[9] In May 2013, the company received a US$5 million Series A investment led by Fred Wilson from the venture capital firm Union Square Ventures.[10] In December 2013, the company received a US$25 million investment, from the venture capital firms Andreessen Horowitz, Union Square Ventures (USV), and Ribbit Capital.[11]

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In 2018 Coinbase launched their independant mobile wallet for iOS and Android. The wallet stores the private keys on the user’s device and only they have access to the funds. This brings Coinbase full circle as it started out as a wallet, transitioned to an exchange only (claiming that they are not a wallet) and now they are offering wallet services again.

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Coinbase is a terrible and unprofessional company. They’ve ignored my requests for escalation after providing no feed back on the issues I am having. These issues are costing this customer not only monetarily, but due to the lack of transparency with new policies in which coinbase will hold your funds hostage for 10 days while advising that it can be transferred “instantly” is not only false, but malicious contempt.

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I have not been using Coinbase long but I have used it long enough to feel like I’m getting burned. I am using Coinbase as, what I call, a pass through as in the end, I am purchasing crypto that is not supported by Coinbase with the BTC I purchase through Coinbase. While the app itself is great as it is easy to navigate the process of withdrawing funds is not so great. I purchased BTC with the intent of withdrawing to purchase another crypto. A week and several emails later my BTC has not yet been released for withdraw. Prior to this transaction I had done several others successfully with no issues, now, for no reason whatsoever my funds are pended for “further research”. I am a patient person but as I’m sitting here waiting the BTC value is falling and the cost of the crypto I am looking to purchase is rising which means at this point I have missed out on a few hundred dollars of profit all because Coinbase won’t release my funds. I am giving only 1 star because (1) communication with Customer Service has not been great as I am still sitting here clueless on what’s going on and (2) I’ve missed out on significant profit and have no idea why or have any sense of comfort that this won’t be an ongoing issue


The other 2% of customer funds, held online, are covered in the event of a breach of Coinbase's online storage. Also, Coinbase holds all customer fiat currency in custodial bank accounts, on behalf of customers. So, if you have fiat currency in Coinbase, in a USD wallet, it is covered by FDIC insurance up to $250,000 (just like a "regular" bank). This protects customer assets (so long as they have been converted to fiat currency) even in the event of Coinbase becoming insolvent.

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Coinbase has two core products: a Global Digital Asset Exchange (GDAX) for trading a variety of digital assets on its professional asset trading platform, and a user-facing retail broker of Bitcoin, Bitcoin Cash, Ether, Ethereum Classic, and Litecoin for fiat currency.[24] It also offers an API for developers and merchants to build applications and accept payments in both digital currencies. As of 2018, the company offered buy/sell trading functionality in 32 countries,[42] while the cryptocurrency wallet was available in 190 countries worldwide.[43] On March 26, 2018, Coinbase announced their intention to add support for ERC-20 tokens.[44]

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Coinbase is a all around awesome platform to quickly and swiftly get into the world of crypto assets. Trusted them from day one and so far so good ! The only negative situation I have encountered has been 1 . I bought $25 dollars of bitcoin and was charged twice but only got $25 worth of bitcoin .... contacted coinbase and that very same day got a email back from them saying they knew about the situation and that they where on top of it because it happened to more people that week... a day or two pass and I received another email saying my problem was resolved..... it wasn’t and still hasn’t been resolved! Thank God I only bought $25 and not a lot more ! It’s $25 I’m not going to be after anyone for that little amount of money but it definitely impacted my good experience with coinbase and their over all standing with me , my friends and my family after this situation that has still not been resolved .
On February 16, 2018, Coinbase admitted that some customers were overcharged in error for credit and debit purchases of cryptocurrencies. The problem was initiated when banks and card issuers changed the merchant category code (MCC) for cryptocurrency purchases earlier this month. This meant that cryptocurrency payments would now be processed as "cash advances", meaning that banks and credit card issuers could begin charging customers cash-advance fees for cryptocurrency purchases. Any customers who purchased cryptocurrency on their exchange between January 22 and February 11, 2018 could have been affected. At first, Visa blamed Coinbase, telling the Financial Times on February 16 that it had "not made any systems changes that would result in the duplicate transactions cardholders are reporting." However, the latest statement from Visa and Worldpay on the Coinbase blog clarifies: "This issue was not caused by Coinbase."[45]
For those of you who have not been paying attention to one of the biggest trends in investing and tech, cryptocurrencies are digital currencies using encryption techniques that regulate the generation of currency and verify the transfer of funds, operating independently of a central bank. Units of currency are created through a process referred to as mining.
Coinbase requires you to link a bank account, or credit or debit card to your Coinbase account to purchase cryptocurrencies. Using a bank account allows for higher limits ($100/transaction, $2,500/week), but it also takes longer to verify transactions, so you will not see money in your Coinbase wallet for two to four days (depending on your bank). And when selling Bitcoin, once the sale is confirmed, it takes two to four days for the proceeds of that sale to show up in your bank account. With a credit or debit card, limits are lower ($200/week), but you can purchase digital currencies by simply transferring funds from that bank account to the site. For these transactions, Bitcoin shows up in your Coinbase wallet instantaneously. You can also sell Bitcoin to your PayPal account, effectively cashing out, as your Bitcoin will be exchanged for local currency. This transaction, too, is instantaneous.

是否Cryptocurrency得到征税


Bitcoin (BTC) is the world’s first decentralized digital currency and payment system and is by far the most known and valuable cryptocurrency. It was created in 2009 by an anonymous person or group called Satoshi Nakamoto. Bitcoin enables transactions to be sent peer-to-peer without passing through a central authority. The transactions are recorded on a decentralized public ledger called the blockchain and each payment acquires a small transaction fee to cover the cost of the network. The total supply of Bitcoin is 21 million and it’s smallest unit of bitcoin is called a Satoshi, it’s a hundred millionth of a bitcoin – 0.00000001 BTC. The creation of Bitcoin’s is happening through mining. Miners have the task to validate transactions and keep the network secure. Their efforts are rewarded by new minted Bitcoins and transactions fees. Bitcoin can be exchanged for fiat or other cryptocurrencies, products and services. Over 100,000 merchants and vendors accepts bitcoin as a payment.

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In April 2019, a UK corporate filing stated that Coinbase's non-U.S. revenue grew 20% to €153 million (U.S.$173 million) in 2018 resulting in a net profit of €6.6 million.[37] Coinbase UK CEO Zeeshan Feroz said the company's non-U.S. operations accounted for nearly one-third of the company's overall revenue and Reuters estimated that the company's global revenue totaled "around $520 million" in 2018.[38]

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