Don't touch digital currency contract transaction
The contract transaction of digital currency is not safe. There are still many loopholes in the digital currency trading platform, for example, the most common are the following six kinds:
1. Denial of service attack
denial of service attack is the most important attack against the digital currency trading platform at present. Through denial of service attack, the attacker makes the trading platform unable to access normally, Because users can not accurately distinguish the degree of attack, it often causes panic asset transfer, which brings some loss
2. Phishing incident
even the best technical measures at present can not make the digital currency trading platform avoid phishing attacks. Some hackers and criminals can confuse digital currency investors by means of fake domain names or fake pages, while ordinary investors can't identify the authenticity, so it's easy to cause asset losses
Many digital currency trading platforms use a single private key to protect the hot wallet. If hackers can access a single private key, they can crack the hot wallet related to the private key. For example, in the attack on yapizon of Seoul stock exchange in 2017, the attackers stole hot wallets from the trading platform twice in a year, resulting in a total loss of nearly 50% of the assets of the trading platform and eventually leading to the bankruptcy of the trading platform Fourth, e to the lack of perfect risk isolation measures, or ineffective supervision on the rights of employees, some employees who have the operation rights of the platform use internal trust to seek unjust wealth for themselves. For example, in 2016, the event of employees stealing bitcoin on shapeshift caused a total loss of US $230000 to the trading platform by stealing and reselling sensitive information to others Fifth, the software vulnerability of digital currency trading platform includes single sign on vulnerability, OAuth protocol vulnerability and so on. At present, all countries have laws requiring banks or other financial institutions to implement information security measures to protect customers' deposits. However, e to the fact that the blockchain field is still in its infancy, there is a lack of such specifications for encrypting digital assets. Therefore, it is not accidental that many trading platforms have a large number of loopholes in the absence of security constraints 6. Transaction malleability the technical supporters of blockchain often think that blockchain transactions are highly secure because they are recorded on records that are said to be unchangeable, but each transaction needs to have a corresponding signature, and the records can be forged temporarily before the final confirmation of the transaction 
extended data:
rules of contract transaction
1. Transaction time
contract transaction is 7 * 24 hours transaction, which will be interrupted only ring the settlement or delivery period of 16:00 (UTC + 8) every Friday. In the last 10 minutes before delivery, the contract can only be closed, not opened
Transaction types are divided into two types, opening and closing. Opening and closing positions are divided into two directions: buying and selling:buying open long (bullish) refers to buying a certain number of contracts when users are bullish and bullish on the index. Carry out "buy open more" operation, match success will increase long position
selling pingo (multi order closing) refers to the selling contract that the user makes up for when he is no longer bullish on the future index, offsets with the current buying contract and exits the market. Carry on "sell flat much" operation, match after success, will rece long position
short selling (bearish) refers to the new sale of a certain number of certain contracts when the user is short or bearish on the index. Carry out the operation of "sell short" and increase the short position after successful matching
buy close (short single close) refers to the buy contract that the user will not be bearish on the future index market and make up for, offset with the current sell contract and exit the market. Carry out "buy short" operation, after matching successfully, short position will be reced
3. Order method
limit order: the user needs to specify the price and quantity of the order. Limit order can be used for opening and closing positions
order at opposite price: if you choose to order at opposite price, you can only enter the order quantity, not the order price. The system will read the latest competitor price at the moment of receiving the entrustment (if the user buys, the competitor price is the selling price of 1); If it is a sell, then the counter price is buy 1 price). Issue a price limit order for this counter price
4. Position
the user owns the position after opening and trading, and the positions in the same direction of the same contract will be merged. In a contract account, there can only be 6 positions at most, that is, multiple positions of current week contract, short positions of current week contract, multiple positions of next week contract, short positions of next week contract, multiple positions of quarterly contract and short positions of quarterly contract
5. Order restriction
the platform will restrict the number of single user's positions in a certain period of contract and the number of single open / close positions, so as to prevent users from manipulating the market
when the number of positions or entrustments of users is too large, the platform has the right to require users to take risk control measures, including but not limited to cancellation of orders, closing positions, etc. The platform has the right to adopt measures including but not limited to limiting the total number of positions, limiting the total number of consignments, limiting the opening of positions, withdrawing orders, forcibly closing positions, etc. for risk control
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I think this is an investor's mentality, which has two aspects: one is the mentality of holding bitcoin, the other is the mentality of not holding bitcoin
① when you hold bitcoin, if you care about the change of market price, you are often controlled by the makers, neither selling nor buying. Because no matter you buy or sell, you will die in the end. Therefore, you need to change your mind and have a long-term view. It's easier to make profits in the long run. Feng Lun's definition of investment and speculation is based on time. The banker is the controller of speculation, and the retail investors can't play. Therefore, we should make investment and long-term investment, and don't care too much about the rise and fall of the moment. If we are anxious, we will be confused
② if you don't own bitcoin, you should be calm. The rise and fall have nothing to do with you. What's your hurry. Slowly wait for a good time to buy, and then return to the mentality of ①
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it is also possible to use bitcoin to trade on Fuxiang's Binary Options website. The trading rules of bitcoin's binary options are different from other forms of trading. The bitcoin's binary options provided by Fuxiang's binary options trading platform are more "simple" and "rough". What you need to do is to judge the entry point according to the expiration time, as shown in the figure, I believe that the current price still has the opportunity to rise before 04:00 on December 12, so I will buy a 100 dollar call option contract at this price (US $393.91). When it matures, as long as the price is higher than US $393.91, Xiaobian will make 70% profit, that is US $70
The basic operation course of bitcoin binary option is as follows:
③ input the amount you want to invest in the order area, and then click "buy"
to complete the operation of an order. You just need to wait for the expiration, and the order will automatically settle whether it is profitable or not
Different colors of the cream have different effects, according to their own needs to choose
1, ivory white: suitable for some skinned people who need no more skin color correction. They use them to cover defects and pore, and create the effect of nude make-up. Some people, regardless of their skin color, rashly choose ivory white in order to make them look white. In fact, it's a big mistake. In this way, the skin color of their face and body is far from natural. Most of us are not particularly white, so we should be cautious.
2. Light skin color: darker than ivory, more suitable for our Asian skin color. The skin is not black or white, and tends to be popular. Choosing this color is not too wrong
3. Dark skin color: this color is more suitable for the dark beauty, which will make the skin white. Don't choose the color number with your own skin color
Soft pink: it is suitable for people with fair complexion but not good complexion. Soft pink can add color to the skin and make people feel better. People with dark skin should choose carefully, otherwise they will appear black and red5. Purple: purple, which is very popular recently, can neutralize yellow. Girls with dark yellow skin can use it to brighten their skin and make their skin look healthy and bright
6. Green: specifically for reddish skin, covering red blood and pockmarks to make skin look clean and shiny
extended information:
isolation cream is an important item to protect skin. The essence of sunscreen is sun protection. The sunscreen used in isolation cream is the same as that used in sunscreen. It is usually divided into organic sunscreen and physical sunscreen
organic sunscreen and ultraviolet can transform the harmful ultraviolet into harmless; Physical sunscreen agents (titanium dioxide, zinc oxide, etc.) mainly rely on the principle of reflection to block ultraviolet rays
to sum up, black people choose black, white people choose white, close to their skin color, and colorful BB Cream / isolation cream can neutralize and brighten their skin color. The most reliable thing is to have a try at the store counter
Bus line: Rail Transit Line 2, about 25.2km long
1. Walk about 1.4km from Hubei hongtongyuan securities investment fund to Huquan station
2. Take Rail Transit Line 2, after 16 stops, to Changgang Road Station
3, walk about 2.1km, to Wuhan Central Hospital
bus line: 618 → 805, about 26.3km long
1 Walk about 210 meters from Hubei hongtongyuan securities investment fund to Kangfu Road Station on chukang road
2, take No. 618, pass 15 stops, reach Dongting station on Zhongbei Road subway
3, take No. 805, pass 16 stops, reach Houhu District Station of gusaoshu Road Central Hospital
4, walk about 160 meters, and reach Wuhan Central Hospital
leverage trading is also known as virtual trading and deposit trading. That is to say, investors use their own funds as guarantee to enlarge the financing provided by banks or brokers to carry out foreign exchange transactions, that is, to enlarge the trading funds of investors. The proportion of financing is generally decided by banks or brokers. The larger the proportion of financing is, the less capital customers need to pay
the international financing multiple or leverage ratio is between 20 times and 400 times, and the standard contract in the foreign exchange market is RMB 100000 per hand (which refers to the base currency, that is, the currency before the currency pair). If the leverage ratio provided by the broker is 20 times, it will cost RMB 5000 per hand (if the currency of the transaction is different from that of the account guarantee gold coin, It is necessary to convert the amount of deposit; If the leverage ratio is 100 times, a margin of 1000 yuan is required for the transaction. The reason why banks or brokers dare to provide a larger proportion of financing is that the daily average fluctuation of the foreign exchange market is very small, only about 1%, and the foreign exchange market is continuous trading. With perfect technical means, banks or brokers can completely use less margin of investors to resist market fluctuations without having to bear their own risks. Foreign exchange guarantee metal is used for spot trading, and has some characteristics of futures trading, such as trading contract and providing financing, but its position can be held for a long time until it is voluntarily or compulsorily closed