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."
Because the blockchain works by verifying transaction history, and this verification process is labor-intensive and slow, only so many transactions can be verified in a certain timespan. So, if you sell your Bitcoin, but the purchase isn’t confirmed by the blockchain network, and the price of the currency changes, the sale won’t process. You'd have to sell your Bitcoin at whatever the new rate is (if you so choose to sell). Also due to the reality of blockchain, as well as for other reasons thus far unidentified, the Coinbase payout system can sometimes be unreliable. There have been reports of extensively delayed payout periods, and bugs sometimes keep the site from running as efficiently as it could or should. A word to the wise: if you are going to invest in and speculate on cryptocurrencies, do so carefully.
Yes. Bitcoin has not been made illegal in any country to date, although some nations restrict its use more heavily than others. Bitcoin is often associated with crime, because it can be used to make criminal transactions. However, this is true of any currency. Bitcoin is harder for authorities to trace than digital fiat transfers, but easier to trace than cash, and most criminal transactions in the world are made with fiat, not Bitcoin.
取引は簿記上，仕訳を経て勘定口座 (簿記計算の単位) に記録されるが，元帳はこの勘定口座を全部集成したもので，本来の簿記計算に直接関係のない仕訳帳や日記帳などに対応する会計帳簿の中心的存在である。元帳には企業のすべての財産，資本の増減が勘定科目に分解されて日々記入されるので，元帳を見れば企業の財産の状態，営業成績を概観することができ，また決算日など特定時点で締切れば貸借対照表や損益計算書などの財務諸表の作成が可能である。したがって元帳は簿記計算のうえで仕訳帳による原始記録から決算財務諸表という企業活動の結論を導き出すための不可欠のものといえる。しかし経営規模の拡大や取引の増大に伴う会計処理業務の複雑化から，会計帳簿の分化，再編が必要とされてきたため，元帳も個々の勘定口座に内訳を設けた多桁式のものや，本社関係の総勘定元帳と工場関係の工場元帳に分離されるなど次第に変化してきている。
In the case of Bitcoin, miners run computer programs to verify the data that creates a complete transaction history of all Bitcoin. A technology known as the blockchain, which is used to create irreversible and traceable transactions, makes the process of verification possible. Once a miner has verified the data (which comes in a block, hence, blockchain), they are rewarded with some amount of digital currency, the same currency for which they were verifying the transaction history. So mining Bitcoin, for example, would earn you Bitcoin.
Bitcoin’s dominance, that had risen above 71% in the past week is showing signs of cooling down. It has currently dropped below 70%. This implies that, for a few days, the action might shift to altcoins. However, this period of low volatility is unlikely to continue for long because after the Bakkt launch, both bulls and bears will attempt to establish their supremacy. This will result in increased volatility and a trending move.
Whether Bitcoin is a good investment for you depends entirely on your own preferences, risk aversion, and investment needs. Nobody can say whether Bitcoin, or any other asset, is a good investment with certainty. While the price crashes of the past have typically proven to be lucrative investment opportunities, past performance is not a sure indicator of future performance, and you must use your own judgement when making an investment.
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This article is intended as a news item to inform our readers of various events and developments that affect, or that might in the future affect, the value of the cryptocurrency described above. The information contained herein is not intended to provide, and it does not provide, sufficient information to form the basis for an investment decision, and you should not rely on this information for that purpose. The information presented herein is accurate only as of its date, and it was not prepared by a research analyst or other investment professional. You should seek additional information regarding the merits and risks of investing in any cryptocurrency before deciding to purchase or sell any such instruments.