Digital currency boom

1.

1、 Different definitions:

1. virtual currency:

virtual currency refers to non real currency

digital currency:

digital currency is an alternative currency in the form of electronic currency. Both digital gold coin and cryptocurrency belong to digiccy

3. Cryptocurrency:

cryptocurrency is a kind of transaction medium that uses cryptography principles to ensure transaction security and control the creation of transaction units

4. Token (token):

a kind of article whose shape and size are similar to currency, but the scope of use is limited and has no currency effect, and its token is the homonym of token in English

Second, the characteristics are different:

1; It can also be said that virtual currency is personalized currency. In another way, it can also be called information currency

2. Digital currency:

is an unregulated and digital currency, which is usually issued and managed by developers and accepted and used by members of specific virtual communities

Cryptocurrency:

cryptocurrency is based on the decentralized consensus mechanism, which is opposite to the banking and financial system relying on the centralized regulatory system

4. Token (token):

usually needs to be exchanged for money, used in shops, playgrounds, mass transportation and other places, as a voucher to use services and exchange goods

extended data

at present, digital currency is more like an investment proct, because it lacks a strong guarantee agency to maintain its price stability, and its role as a value measure has not yet appeared, so it can not be used as a means of payment. As an investment proct, digital currency cannot develop without trading platform, operating company and investment company

digital currency is a double-edged sword. On the one hand, the blockchain technology it relies on has been decentralized and can be used in other fields except digital currency, which is one of the reasons why bitcoin is popular; On the other hand, if digital currency is widely used by the public as a kind of currency, it will have a huge impact on the effectiveness of monetary policy, financial infrastructure, financial market and financial stability

2.

When bitcoin was first launched, a bitcoin could not buy a hamburger, but now a bitcoin can buy a car, which is the violence of virtual currency. The virtual digital currency led by bitcoin has let many investors see the dawn{ RRRRR}

we all like to save money, at most for a fixed period. A few people buy stocks, let alone virtual digital currency

the biggest risk of digital currency is instability. It is not a currency recognized by the International Monetary Fund. Bitcoin can not be traded directly, nor can it be used to buy things directly, because the number of bitcoin is limited. Therefore, many people feel that it is necessary to invest

and now many countries prohibit the transaction of virtual currency, because digital currency helps money laundering. Many people launder money through digital currency to evade supervision. Once the government finds it illegal, it will be unfavorable for the trend of digital currency

there is a lot of uncertainty in digital currency, and the biggest fear is the collapse of the whole system. In the end, there is nothing left, so there are risks in investment

3. It is inevitable to lose money; In recent years, the speculation related to virtual currency (such as ICO, IFO, IEO, IMO and STO) has been in vogue. The price has gone up and down, and the risk has gathered rapidly. Relevant financing entities raise funds from investors or virtual currencies such as bitcoin and Ethereum through illegal sale and circulation of tokens. In essence, they are illegal public financing without approval. They are suspected of illegal sale of token bills, illegal issuance of securities, illegal fund-raising, financial fraud, pyramid schemes and other illegal crimes, which seriously disrupt the economic and financial order

on September 4, 2017, the people's Bank of China and other seven ministries and commissions issued the "notice on preventing the financing risk of token issuance", which cleaned up the ICO and virtual currency trading venues. The scale of domestic virtual currency transactions decreased significantly, effectively avoiding the impact of virtual currency prices on China's financial market.

4. One USB can use four USB devices. Generally, it can only use some low-power devices, such as USB flash disk, card reader, mouse, etc.
if you use a mobile hard disk or something like that, other ports may not be available

5. Virtual currency plays the role of "currency" on the Internet. For example, q-coin, which purchases virtual goods online, is not limited by the amount of money needed in real circulation. Virtual currency should be purchased in RMB, which is a commodity.

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7.

American Stock Research Society points out: different styles of strategies have different requirements for back testing, such as multi factor stock selection or trend strategy. The following points should be noted:

1. Distinguish the data in the sample from the data out of the sample, which is very similar to machine learning. The data in the sample is used for training, and the data out of the sample is used for verification the purpose of this is to avoid the over fitting trap

2. Income distribution: look at the income distribution of all transactions after your back test, and see whether your income source is a few times of large income or a few times of small income if it comes from a large return, your return will fluctuate greatly, and the firm offer will often fail to achieve your effect

3 if you have a parameter that is too sensitive to adjust, it will have a great impact on the revenue, and the situation of your real offer and the simulated offer are also likely to be different

strictly speaking, this kind of strategy avoids some common pitfalls, and it is relatively easy to achieve back testing and real offer
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