300202 has digital currency

1.

1. Bithumb

bithumb is the largest digital currency exchange in South Korea and the top ten in the world in terms of trading volume. Its daily trading volume exceeds 13000 bitcoins, accounting for about 10% of global bitcoin trading volume. It promises to provide the lowest handling charge in the world. Bithumb accounts for 75.7% of South Korea's bitcoin market, 10% of the global bitcoin market, and 50% of South Korea's Ethereum market

Bitmex is established in the Republic of Seychelles as a leading leverage trading platform. It can operate cryptocurrency derivatives trading as high as 100 times leverage, and also provide high leverage for other digital currency procts. Bitmex offers more than a dozen futures and swap procts. Bitcoin is one of the most active trading varieties, which can be divided into three types: xbtz17 (bitcoin / USD futures), xbjz17 (bitcoin / yen futures) and xbtusd (bitcoin / USD perpetual swap)

to register a bitmex account, just fill in the email, password and country. The name can be left blank. Bitmex does not accept the recharge and withdrawal of legal currency, so it does not have to follow the bank's KYC / AML requirements to obtain the user's personal information

Okex

3, okex

okex mainly provides global users with spot and derivative trading services of digital assets such as bitcoin, lightcoin and ethereal currency, which is subordinate to okex Technology Company Limited. Since 2014, we have been committed to providing bitcoin, lightcoin, ethercoin and other digital asset currency and derivatives trading services to global users, adopting advanced technologies such as GSLB, distributed server cluster, distributed storage, high-speed memory trading engine with multi machine mutual backup, cold wallet, hot money package with private key offline, etc

As one of the most concerned companies in the international blockchain instry, Qian'an is jointly founded by Zhao CHANGPENG, former blockchain CTO, a well-known blockchain company, and He Yi, former vice president of science and technology, to provide users with more secure and convenient digital currency exchange services and aggregate global high-quality digital currencies, It is committed to building a world-class blockchain asset trading platform. Only 50 days after its launch, the company's users have covered more than 180 countries around the world. This is the first time that the company has disclosed its financing information

5. Hotcoin is one of the three major exchanges in China. Headquartered in Beijing, it also has many exchanges, including domestic stations, international stations, quantitative trading, etc. hotcoin is a domestic station. Since its establishment in 2013, the accumulated trading volume of hotcoin has exceeded $100 billion, once becoming the largest digital asset trading platform in the world, It occupies 50% of the global share of digital asset transactions, and has been invested by Zhenge fund and Sequoia Capital

fire coin group has invested in more than 10 upstream and downstream enterprises, and has completed the establishment of compliance service teams in Singapore, South Korea, Hong Kong, Thailand, Australia, Canada, Brazil, Britain and other countries and regions, providing secure and reliable digital asset trading and asset management services for millions of users in more than 130 countries

6, bibox

bibox is the world's first artificial intelligence digital asset trading platform, which innovatively realizes transaction security, platform stability and operation convenience; Financial derivatives services are well-known in the instry. The platform not only provides spot trading, but also provides financing, currency financing and contract trading business. Investors can carry out long short two-way operation. They can obtain the income from the rise in the price of digital assets by buying long and obtain the income from the fall in the price of digital assets by selling short, which is convenient for traders to invest and hedge

Hitbtc

7, hitbtc

hitbtc was established in 2013 and obtained 6 million euro venture capital. Headquartered in Europe, it is a bitcoin trading platform in the UK, supporting the current mainstream encrypted digital currency portfolio trading, including BCC / BTC, ETH / BTC, XmR / BTC, LTC / BTC, EOS / BTC, EOS / eth, etc. at present, there are 762 trading pairs. Hitbtc is operated by hit Solutions Limited in Hong Kong and has a dedicated support and communications office in Santiago, Chile

Digifinex

digifinex is a block chain Digital Asset Exchange registered in Seychelles, which mainly provides currency trading services of bitcoin, Ethereum, lightcoin and other digital assets for global users. According to non trumpet data, there are 103 platform trading pairs at present. Digifinex is founded by blockchain and digital asset enthusiasts, with core teams from Xunlei, Tencent and Internet. It is operated by digifnex limited, which is registered in Seychelles, and its current operation center is located in Singapore

ZB network is a global digital currency exchange. Currently, there are 168 platform trading pairs, which support OTC and spot trading. At present, it has obtained the exchange license of Thailand and Du, and has set up operation centers in Switzerland, Canada, the United States, Bangkok, Du and other places. ZB focuses on providing global customers with safe, convenient and compliant blockchain asset trading services

10, coin win international station

coin win is a global digital asset trading platform set up by Chinese state-owned enterprises in Hong Kong. It adopts bank level security technologies such as cold storage, SSL and multiple encryption to ensure the security and stability of virtual currency transactions. It mainly provides transaction services of digital assets such as ether currency and HSR for global users, and is subordinate to citicash Hong Kong Investment Limited. Currently, there are 51 platform trading pairs, which support OTC and spot trading

2. For many people, the concept of digital currency is a mystery. But there is no doubt that digital currency is different from virtual currency

virtual currency is the electronization of illegal currency, and its original issuer is not the central bank. This kind of virtual currency is mainly limited to circulation in a specific virtual environment. Digital currency can be used for real goods and services transactions, but only the digital currency issued by the state is legal digital currency

in 2013, the central bank, together with five ministries and commissions, issued the notice on preventing the risk of bitcoin, which clearly defined non legal digital currencies such as bitcoin as virtual commodities, not in the form of currency and legal currency< At the same time, digital currency is different from electronic payment. In the actual use experience, digital money and electronic payment may feel similar, but they are still quite different in essence. Before digital currency, the financial instry has been highly informationized. Such as Internet banking, WeChat, Alipay and so on pay the popularization of electronic technology, physical cash accounts for only a very small part of the total circulation of money. In spite of this, because the money used in the transaction comes from the bank account, it actually corresponds to the banknotes.

3. Bitcoin, of course, is the hottest one. In addition to bitcoin, there are also:
1. Litecoin is similar to bitcoin, which is also an encrypted digital currency, and its price has risen sharply recently. It is a P2P open source digital currency, which can be regarded as a branch of bitcoin. However, although lightcoin is based on bitcoin protocol, it does not require very high computing power. It can also be mined using ordinary computers. Lightcoin's algorithm comes from the algorithm designed by Dr Colin Percival for tarsnap secure online backup service (backup for Linux and other open source operating systems)
2. Namecoin
namecoin is also based on bitcoin, which is another branch of open source. Namecoin is a distributed DNS protocol -- generally speaking, it can transform the website name (such as ifeng. Com) that can be understood by human into the address that can be understood by machine. As its own DNS, this kind of currency can operate outside the normal Internet, so it can break away from the control of ICANN
the monetary value and domain name of namecoin are stored in the user's blockchain records, limiting the total number to 21 million
3. Peercoin
peercoin is a peer-to-peer variant of bitcoin, which can improve mining efficiency and security, and improve safeguard measures to avoid group mining. Now, group mining has been considered as a potential defect of bitcoin. According to the statistics of emerging currencies by coinmarketcap.com, peercoin currently ranks fourth in the market value of digital currencies
4. Primecoin
primecoin is a cryptocurrency similar to bitcoin, but it uses a completely independent mining algorithm. Bitcoin uses the hashcash algorithm, while prime coin uses the long Cunningham chains to create the value of money - a sequence of prime numbers named after mathematician AJC Cunningham
in the process of bitcoin mining, as the amount of money goes on, the difficulty will increase sharply. But prime is different. Every time a primecoin is mined, the mining difficulty will increase slightly, and the process is much more stable< 5. Feathercoin

based on the design of litecoin, released in April 2013, can adjust the mining difficulty more frequently than litecoin. Feathercoin will be updated frequently, adding new features and improvements to eliminate malicious mining behavior

6. Novacoin

another P2P digital cryptocurrency. Novacoin is different from most other currencies in that it integrates a protection mechanism in the currency core, which can identify illegal mining activities

the total number of novacoin is limited to 2 billion, which is considerable. If necessary, the total can be adjusted upward

7, infinitech

published in June 2013. A by-proct of litecain. According to the mining situation and the total amount of money, infinite money can frequently adjust the mining difficulty ratio< Megacoin was only released in the fourth quarter of 2013, imitating bitcoin in the early stage. The total number of megacoin is limited to 42 million, which can be mined like other virtual currencies. Its biggest selling point is brand publicity, which other digital currencies lack< It was released in 2013 and is still in its infancy. In the security part of quarkcoin, nine independent loops are deployed and six different algorithms are used.

4.

Generally, the excellent digital currencies are mostly imported procts, such as bitcoin, Leyte coin, ether coin and so on. However, the domestic Yuanbao coin, Ruitai coin, bitcoin and the tokens of different crowdfunding projects of European crowdfunding are excellent digital currencies

< H2 > development materials

digital currency (English: digital currency) is an alternative currency in the form of electronic currency. At present, no central bank of any government has indicated that it will issue digital currency, and digital currency does not have to have a benchmark currency and a central bank

it is different from the virtual currency in the virtual world, because it can be used for real goods and services transactions, not limited to online games. The early digital currency (digital gold currency) is a form of electronic currency named after the weight of gold. Today's digital currency, such as bitcoin, lightcoin and ppcoin, is an electronic currency created, issued and circulated by check sum cryptography

5. I can't give you an accurate answer to this question because digital currency covers too many aspects. There is also the possibility that many new cryptocurrencies are born or die every day. Now the world's more well-known digital currencies are bitcoin, dogcoin, Leyte coin, bitstock, reborn coin, Yuanbao coin, Diandian coin and so on. It is said that Ecuador, a small South American country, recently created its own official cryptocurrency
according to incomplete statistics, more than 200 counterfeit coins have been proced since 2014, and more than 100 have survived. The life cycle of Shanzhai coins is generally about 2
-
3 months. Because the purpose of some Shanzhai coins is to earn money without any innovation. When the price is high enough, the makers will sell a lot to cash out. Without the support of the makers, this kind of counterfeit money will eventually die
for more information about cryptocurrency, you can visit bitcoin home.

6. GEC environmental protection coin is issued by swindlers. How to set it? Swindler customer service!

7. Go to the internet post bar virus bar, there are tutorials. You can also install a Kaspersky (there is a special killing tool). If you can't, go to the computer virus for help. The talents there are more professional

8.

The correct methods to identify gold include the color, density, folding hardness, phonological elasticity, Touchstone and acid point

According to the different luster and color of gold, we can roughly distinguish pure gold, K-gold, real gold and fake gold. That is to say, the best color of gold is reddish yellow, and the fineness is more than 95%; The purity of positive yellow is about 80%; The purity of cyan yellow is about 70%; It's yellow with gray, and its fineness is about 50%

The density of gold is 19.32 g / cm3, which is about twice as heavy as the same volume of silver, lead and tin. Available formula: a certain gold jewelry mass (g) than a certain gold jewelry volume (cubic centimeter) equal to density. If the density of gold jewelry is about 19.32 g / cm3, it is pure gold or relatively pure gold, otherwise it is non pure gold or color difference gold (this method is not destructive to jewelry)

3, fold hardness

gold has the characteristics of low ctility and hardness, and can be pressed into 12.7 μ m thick sheet. When the fineness is high, the mark can be left by carving with a pin or nail. More than 97% of the fineness of gold jewelry, after bending two or three times, wrinkles appear at the bending place, also known as fish scale pattern; Gold jewelry of about 95% fineness feels hard when bending, and the fish scale pattern is not obvious

The gold jewelry with

90% fineness is very hard when bending, and there is no fish scale pattern; Gold jewelry with more impurities will break after bending two or three times; If it is made of raw gold, it will break when it is bent, and the section has obvious sand grain shape. When using this method, the width and thickness of jewelry should be considered. The thick and wide ones are harder, and the thin and narrow ones are softer

4. Rhyme elasticity

when gold jewelry with high quality is knocked or thrown to the hard ground, it will make a ll low sound of "puta, puta", and has no rhyme or elasticity. K gold has rhyme, sound and elasticity. The greater the elasticity, the sharper the rhyme, the worse the quality

5. Touchstone

the fineness of gold jewelry can be determined by comparing the colors of gold pairs (gold medals with determined fineness) and jewelry on the touchstone. This method should be carried out under natural light and fluorescent lamp, not under direct sunlight and incandescent lamp

6. Grind out the gold channel of the identified jewelry and the matching brand on the touchstone with acid point

respectively, and point nitric acid on the gold channel with glass rod. Because the chemical property of gold is stable and does not react with acid, the color remains unchanged. If it is not gold or pure gold, the golden way disappears or changes

The change rule of

was "three fast and three slow", that is, the low quality disappeared quickly, and the high quality disappeared slowly; The mixed gold disappears quickly and the clear gold disappears slowly; Large mixed gold disappears quickly, small mixed gold disappears slowly. The fineness of gold jewelry can be determined by comparing the right brands according to the disappearance of gold channel

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extended data

distinguish alteration

1, whether gold has white highlights

cut the gold bar or gold jewelry with material scissors, observe its section with a magnifying glass, if there are white highlights, because gold and iridium can not be fused together, it means that the gold is doped with iridium

2

first measure the weight of a piece of pure gold bar with a balance, then put the gold bar into a measuring cup and pour water to submerge the gold bar. Then put the detected gold bar into the measuring cup and observe whether the scale of water rises or falls. As long as it changes, it means that the gold bar is not pure gold. But if it is gold jewelry, this method is not applicable, because there is air in gold jewelry

Real gold is not afraid of fire

burn the gold bar or gold jewelry on the fire for a while and observe the change. Because of the oxidation reaction between iridium and oxygen in the air, the gold bars with insufficient purity will turn gray; The pure gold will be bright red after being roasted. However, this method may have some damage to jewelry

9. Of course, bitcoin is the hottest, followed by Ethereum. Of course, doggy coin has been hot recently. After all, the price has increased several times, and the new fil coin derived from filecoin is the topic of discussion.