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比特币交易市场Mt.Gox刚宣布无限期停盘，说软件里Bug可让公开交易记录被更改，2周前比特币基金会副主席被美国抓，涉嫌帮毒品网站洗钱！之前我发比特币的微博，引起看好做多的 与看淡做空的人对骂，都为切身利益。但做空比特币很难赚钱啊！看下面第三第四遍文章 为私利我今后也会微博上骂没诚信道德的贱人 - 做空比特币没有做空中概股赚钱，即使做空比特币后，猜中价钱下跌后也很有可能会亏本。所有前几个月比特币才拼命
- 让和谐的平台变为对骂的平台，就好像很多美股论坛上，做多与做空的人经常对骂， 侮辱对方。
- 我想找些无良的人对骂，特别是以为有点诚信的亲友，这样可以提高我微博的关注度！
以前反日的才派水军攻击我支持日本抗震救灾，现在水军们居然会支持日本发明的BitCoin和占全球50%市场的日本Mt.Gox？中国人连中国人都不信,骨子里买日本老外品牌也不信中国品牌。连Mt.Gox都自认系统有Bug公开记录会被更改，中国系统比日本发明的更好？还是认输吧，美国日本做老大老二也轮不到中国做小三
大家都不傻，创业或投资前都以为三思无数次，但想不够+不听负面+执行差。死里偷生后复盘都感慨很多没想到,我也是，科网泡沫损失最大的反而是IT精英，聪明反被聪明误！http://t.cn/8F1DdvY //@皇帝的财宝:唐老师，你说的这些所谓“风险”在比特币圈子里面早就讨论过无数遍了，这种嚼成渣的馒头就别再嚼了，一点味道都没有了
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Bitcoin plunges after marketplace indefinitely halts withdrawals http://www.reuters.com/article/2014/02/10/us-investing-bitcoin-idUSBREA191Y220140210 Mon Feb 10, 2014 Feb 10 (Reuters) - The price of the digital currency bitcoin slid to its lowest level in nearly two months on Monday after bitcoin digital marketplace Mt. Gox said a halt on withdrawals it announced on Friday would continue indefinitely after it detected "unusual activity." The bitcoin price varied dramatically from one exchange to another, with Tokyo-based Mt. Gox, the best known operator of a bitcoin digital marketplace, recording one of the biggest drops for the day. On the Mt. Gox platform the currency plunged to as low as $500 early on Monday, down more than 27 percent from Friday's final price of $692, according to the Mt. Gox website. It last traded at $595.74, off nearly 14 percent from Friday. "This technical issue is of a much larger intensity than we've seen in the past," said Sebastien Galy, currency strategist at Societe Generale in New York. "The market may be realizing that there are issues which are specific to these forms of currencies." The bitcoin in recent months started to gain wider acceptance, with Overstock.com and the Sacramento Kings basketball team both saying they would begin to accept the currency. More recently, the digital currency has drawn increased scrutiny. New York state's top bank regulator in late January revealed plans to regulate businesses handling transactions in bitcoin this year.
TRANSACTIONS COULD BE ALTERED The bitcoin price started falling fast on Friday when Mt. Gox said it was temporarily halting withdrawals due to unexplained technical issues. In an updated statement on Monday, Mt. Gox said withdrawals were on hold indefinitely after it "has detected unusual activity on its bitcoin wallets and performed investigations during the past weeks. This confirmed the presence of transactions which need to be examined more closely." Mt. Gox said a "bug in the bitcoin software" could allow transaction details to be altered. In effect, someone on the network could alter transaction details to make it appear a transfer of bitcoins from one digital wallet to another had not occurred when in fact it had. This might cause the transfer to be repeated. A bitcoin wallet is an application that stores bitcoins for the currency's users. Mt. Gox said the issue was not limited to the exchange and "affects all transactions where bitcoins are being sent to a third party." It said the withdrawal suspension would be in effect until the issue has been resolved. CoinDesk, which launched the CoinDesk Bitcoin Price Index in September, removed Mt. Gox from its index Monday, citing its "persistent failure to meet the index's standards for inclusion." "These recent withdrawal restrictions are just the latest in a series of issues which have made Mt. Gox's inclusion in the BPI problematic," CoinDesk said. On CoinDesk's bitcoin index, the bitcoin price was lower but not by nearly as much as on the Mt. Gox platform. The CoinDesk index showed bitcoin at $667.79 on late Monday afternoon, down about 5 percent from Friday's close of $703.57. Its low for the day was around $540 versus $500 on Mt. Gox. On both platforms, the price was still around the lowest since late December. The price had topped $1,000 as recently as late January. "With the volatility in the currency being as much as it is, it's going to take some time before we get enough of a comfort level from investors and merchants to enable it to be used ubiquitously," said Darrin Peller, managing director at Barclays in New York. The arrest of a prominent bitcoin advocate just over two weeks ago threw a spotlight on the currency. Charlie Shrem, 24, operator of the Bitinstant bitcoin exchange company, was charged by U.S. prosecutors with conspiring to commit money laundering by helping to funnel cash to illicit online drugs bazaar Silk Road. The following day Shrem resigned as vice chairman of the Bitcoin Foundation, an advocacy group.
The best security: A trip through The Onion Router. How TOR works. http://o.canada.com/technology/internet/a-trip-through-the-onion-router/ Published: April 24, 201 Before the Internet, people flocked to secret and well-hidden underground markets to purchase either illegal or morally questionable items. With the birth of the Internet, unlimited access to these items from around the world became a reality. The issue was creating a tunnel to transfer anything from heroin to full libraries of downloaded books, from one part of the world to the next securely and secretly.
Enter Tor. The U.S Naval Research Lab created Tor, or The Onion Router, as an experiment in 1996. The lab has been studying different methods of carrying out anonymous communication between governments for years. The result was the original Tor network. The anonymous network didn’t reach mass popularity until two years ago, though, following an interview between Google co-founder Eric Schmidt and rogue activist Julian Assange in 2011. In the interview, transcripts of which have been published on Wikileaks, Assange and Schmidt talk about Tor and the utter importance it played in helping Assange’s cause. Perhaps what Tor has become most well known for, though, is the Silk Road. Run by an anonymous individual who refers to themselves only as the Dread Pirate Roberts, the Silk Road is a highly illegal and highly profitable passageway for very illegal items. Buyers can purchase pounds of heroin or an arsenal and have it delivered to their home without leaving a trace. Discussions take place on a huge number of Tor forums daily between drug dealers from around the world discussing the latest trends and their future purchases. Being able to purchase and sell items without disclosing the location you are ordering or selling from provides a type of secure freedom you can’t find elsewhere online.
One of the biggest reasons Tor has become a common term in the past couple of weeks is its relation to Bitcoin. Bitcoin, the digital currency that recently saw a surge in market value last week, is the only currency accepted when shopping the Silk Road. Once again, Bitcoin is untraceable and isn’t tied to physical locations. The combination of a secure currency on an untraceable network is very powerful. But Tor is more than just breeding ground for illegitimate trades. It’s become one of the most trusted networks for trading documents and secrets across borders, as well. In a recent story on Canada.com, John Blanchard wrote about the use of Tor in a variety of situations, including Syrian activists who would send and receive packages explaining how to bypass Internet security. In a state of constant war, where government officials have made it increasingly difficult for Syrian civilians to access social networks and the online world, packages like these showcase precisely what Tor was created to do. About six months ago, a friend and I had heard about Tor and the Silk Road through a thread on the popular internet forum 4Chan. As budding journalists who had some time on our hands, we decided to embark on an online adventure to find the Silk Road.
It took about ten minutes. For a network that prides themselves on privacy and secrecy, it was extremely easy to track down this modern underground passageway. We did a quick Google search for Tor browser, downloaded the appropriate version, and launched it. It’s slower than other browsers but, without a static IP address, it’s to be expected. The difficult part was finding the URL to gain access to the Silk Road. And by difficult, I mean we had to do a detailed YouTube search. Once we found the correct URL for that period (the URL changes constantly to avoid tracking), we were brought to the Silk Road homepage.
From here, we were asked to set up an account to gain access into the site. We did so, and patiently waited as the website booted up, running exceptionally slow on the browser. Once access was granted, however, our eyes were opened to a whole other world I wasn’t aware existed online. Anything your mind could conceive of wanting to purchase but never knew where to do so was available on the front page of Silk Road. Anything from pure crystal meth to entire Adobe collections was a click away. It was the Disney World of the underground. I didn’t have Bitcoins at the time, and decided I wouldn’t try to purchase any of the items up for grabs, an idea my friend and I had for a feature story. From my ventures into the forums, however, I read nothing but positive reviews from purchasers about the anonymity of the trades, and have yet to come across a horror story. Tor is a network just like any other network. It is inhabited by thousands who eagerly search out new websites to spend their time on and by thousands who stumble upon it.
It may have been underground at one point, but it is no longer just a whisper in the dark forums of the Internet’s underbelly. It’s become a tool for activists, hackers, drug dealers, and curious minds. It’s the beginning of a line of networks that will become commonplace very soon.
How to Profit When Bitcoin Falls in Value http://beforeitsnews.com/economy/2014/01/how-to-profit-when-bitcoin-falls-in-value-2587462.html
Friday, January 17, 2014 The Power of the Short Side in Bitcoin If you have never shorted a stock or currency before, that’s OK. In fact, if you have no idea what “shorting” is, that’s fine too. In our experience, only 2% of the investing public are aware of the short side. But, it’s an extremely profitable technique, and something you will want to understand thoroughly—and apply.
What Is Short Selling? Let’s explain by way of example. Suppose your uncle entrusted you with his Mercedes for the summer. He heads for the Bahamas and says, “I’ll see you in the fall.” At that time, Mercedes are in short supply, and the going rate is about $30,000 to own this fine automobile. Unknown to your uncle, you sell his car and put the money in your bank account, earning interest. Now, come August, the Mercedes supply problem has been solved, so there are more of them on the market. You go out and buy the Mercedes back for $25,000. Your uncle returns, gets his car, and you pocket $5,000. That’s how short selling works—you borrow stock from your broker (owned by somebody else) and sell it to the market. You owe the broker the stock. Later, you hope to buy it back (from the market) and replenish the stock you borrowed. If it is priced lower at that point, you pocket the difference. However, what happens if the item is pricier in the future? Let’s say that there is a sudden run on Mercedes in early August, and it costs you $35,000 to buy one. You must come up with this money, so you will suffer a $5,000 loss. In the same way, if you short stock and it goes up, you will lose the difference at the point you “cover” your short sale.
Why Sell Short? The truth is stocks and futures fall much faster than they rise. Why? Because fear is a stronger emotion than hope. It takes less energy for people to buy into a rally than to sell into a panic. If your favorite stock is going up, you aren’t very likely to buy more, even if you think it’s going higher. If a security is falling like a rock, the emotion is, “Get out!” So, thousands of players will sell at the same time to avoid taking a loss. By and large, investors and funds are “long,” meaning they own the stock. So, there is a huge wall of pent-up selling pressure, just waiting to be unleashed anytime bad news enters the market.
How to Short Sell Bitcoins The first thing you need to have in order to trade Bitcoins is a professional CFD broker! What is a CFD Broker, you ask? CFD stands for “Contract For Difference”. When buying a CFD on a specific asset through a broker you are required to have enough funds in your account to cover for the potential difference in the asset price in case the asset you purchase will lose value. The broker will offer you leverage and allow you to buy contracts that are higher in size compared to your total account value. Contract For Difference can also be ‘shorted’ or sold. This means that you can sell an asset without even owning it if you think the value will decrease in time. More information on CFD’s here. One of the high profile brokers is now offering CFD’s on Bitcoins. The broker is Ava Trade. If you think the Bitcoin is going to lose value because it has already risen too much in a very short time, you can sell Bitcoins without even owning them. You can simply sell the CFD contract and you will make profits from the decrease in value. This is called ‘short selling’ in financial jargon and is often used by investment funds when the markets are falling. Selling short is something every trader should do. The market has ebbs and flows. And, ferocious declines happen often. On a smaller scale, they happen every day to certain cryptocoins and contracts (forex). Trading the short side is a very profitable habit. The key to success is practice, practice, practice.
How to bet against the bitcoin megabubble http://finance.fortune.cnn.com/2013/12/05/betting-against-bitcoin-bubble/ December 5, 2013 One reason the virtual currency has been soaring could be that figuring out how to profit from its fall is tough. FORTUNE -- Can you bet on the likely eventual bitcoin crash? You bet. But it's an expensive trade. And even if you're right, you won't walk away with much, if anything. The traditional way you bet against something is to "short it." But in order to do a short sale you have to borrow a share of stock or bond or whatever you are looking to bet against. And borrowing bitcoins is nearly impossible. There is a company based in Hong Kong in testing phase that seems to offer bitcoin shorting, but I couldn't find out much about it. MORE: Bitcoin's tipping point What you can buy is a derivative contract that will rise in value when bitcoins fall in price. There are a number of places that sell options and futures on bitcoins. One place -- ICBIT, a bitcoin exchange -- is run by a guy in Moscow. MPEx, a stock exchange for companies with shares traded in bitcoins -- there are four of them -- also lists bitcoin options. BitInstant, a Brooklyn-based payment processor, is planning on launching a bitcoin futures exchange early next year. All of these places require that you open an account to start trading, and none of them take dollars. So you have to buy some bitcoins elsewhere, which in itself is no easy task, and transfer them to your ICBIT or MPEx account before you can get started. MPEx charges 30 bitcoins to open an account, which at Wednesday's closing price was $33,000. I heard good things about ICBIT, which offered accounts for free but charges a commission when you trade. But to see the prices of the contracts, you had to get your account up and running and deposit a minimum of 0.1 bitcoins. (You can buy bitcoins in fractions.) MORE: What is bitcoin? I decided to check out Coinbr, a brokerage firm that allows you to trade options on MPEx without opening an account there. You still have to deposit 0.1 bitcoin in a Coinbr account to get started. But MPEx allows anyone to see the prices of its contracts, so you know what you are getting into before you start. Here we go: If you are betting against bitcoins, what you want to do is buy a put option, which is a derivative contract that allows you to sell something at a set price. If the actual price of the thing falls below the set price, or strike price, you make money. You could also sell a call option, the right to buy at a set price, but that is riskier and requires collateral. So I stuck to looking at put contracts. It cost 0.045 of a bitcoin, or $49.50, to buy a put contract to sell 1/10 of a bitcoin at a strike price of $1,100 per bitcoin. The contract expires at the end of the month and will expire worthless if the price of a bitcoin is above $1100 at that point. But the value of the contract will go up before then as long as the value of a bitcoin drops. Let's supposed bitcoins were to fall to $500 by the end of December, a 55% plunge in less than a month. If that were to happen, the price of my bitcoin put contract would jump. Here's the problem: To book my profit, I ultimately want dollars. With normal currency options you can choose to collect in whatever currency you are using to bet against another currency. So if you are betting the price of a euro will fall against a dollar, you can collect in dollars when the contract settles, thereby offsetting the fact that the euro just dropped in value. MORE: A decade of markets, mayhem, and investing You can't currently do that with bitcoins. All of the bitcoin options and futures contracts are settled in bitcoins. This is a very bad deal. Because even if I end up with a bitcoin windfall, they will be worth a lot less when I convert them back into dollars. Here's the math: To open an account, it has to be funded with 0.1 bitcoin, which will cost $110 as of Thursday morning. The put option costs 0.045 bitcoins, leaving 0.055 bitcoins still in the account. After our imagined 55% plunge, the value of the put contract has soared to 0.12 bitcoins. Combine that with what is still in the account, and it's now 0.175 bitcoins. At a bitcoin price of $500, that's a mere $87.50. That means even if you are right, and you call the top of the bitcoin bubble, correctly predicting a whopping 55% plunge in the value of the currency and do all of this, you would lose $22.50. You can get around this by upping your bet against bitcoins. If instead you buy two contracts, for $99, and once again the price plunges 55%, you will end up making a whopping $15. And I haven't factored in fees, which would probably run you about $4 for the whole transaction, including the dollar-to-bitcoin round trip, taking your profit down to $11. On top of all that, this isn't like trading on the New York Stock Exchange. Midday Wednesday, MPEx appeared to shut down, and the prices of the contracts disappeared. I was told this happens a lot. As of early Thursday, the exchange still wasn't listing prices. What's more, after running through my math of the trade with a Coinbr broker in a chat room, with the conclusion that basically the trade doesn't make sense, he offered to sell me contracts at 0.033 bitcoins, so I could buy three contracts instead of two with my 0.1 bitcoins. That led me to question just how real the prices MPEx was quoting were. All of this may explain one reason why the price of bitcoins until recently has been heading straight up. Why bother betting against it?
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