Can blockchain get rid of dollar control
blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies
the so-called consensus mechanism is a mathematical algorithm to establish trust and obtain interests between different nodes in the blockchain system
in a narrow sense, blockchain is a kind of chain data structure that combines data blocks in chronological order in a sequential way, and it can not be tampered with and forged by cryptography
broadly speaking, blockchain technology is a new distributed infrastructure and computing method, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data< Advantages:
1) the algorithm is simple and easy to implement
2) there is no need to exchange additional information between nodes to reach a consensus
3) it takes a lot of cost to destroy the system< Disadvantages:
1) waste of energy
2) it is difficult to shorten the block confirmation time
3) the new blockchain must find a different hash algorithm, otherwise it will face bitcoin attack
4) it is easy to generate bifurcation and needs to wait for multiple confirmations
5) there is no finality, and checkpoint mechanism is needed to make up for it.
Why is the Internet era coming to an end and the blockchain era coming
Once the 
blockchain develops, it will burst out more innovation. As the first proct of blockchain, bitcoin has proced many innovations since its birth. For example, small cross-border payment, recording transfer transactions between currencies, recording various stocks, registering housing property rights, recording program codes, etc.
the steam age liberates social proctivity, the electrical age enlivens social cooperation ability, the Internet age connects the world, and the blockchain era will let us truly realize freedom
1. Banking
as a digital, secure and anti-interference account, blockchain realizes the core function of Banking: the safe storage and transfer center of value. In other words, in the next few years, a wave of companies based on blockchain technology may affect the banking instry. Indeed, UBS, a Swiss company, and baecelays, a British company, are trying to use blockchain technology to improve payment terms. Some other banking companies even said blockchain technology could save $20 billion in intermediate costs
therefore, it is not surprising that banks, as financial service giants, have become the growth force of blockchain venture. Payment and transfer
recently, the world economic forum wrote in Forbes magazine that decentralized payment technology, such as bitcoin, may change the "business structure" of the transfer instry that has not changed for more than 100 years. Blockchain technology can avoid complex systems and create a more direct payment process between the payer and the payee. Whether it is domestic transfer or cross-border transfer, this method has the characteristics of low price, fast speed, and no intermediate fees. Abra (above) is a start-up enterprise that uses blockchain technology for global bitcoin and blockchain based transfer
3. Network security
although the system of blockchain is public, advanced encryption technology is used in the process of data exchange such as verification and transmission. This technology not only ensures the correct source of data, but also ensures that the data will not be intercepted in the intermediate process. If the application of blockchain technology is more extensive, the probability of being attacked by hackers may also decrease. Therefore, people think that blockchain system is more secure than traditional system. One of the reasons why blockchain system can rece the traditional network security risk is that it relieves the demand for middleman
"eliminating middlemen not only reces the potential security risk of hacker attacks, but also reces the possibility of corruption," Goldman Sachs wrote. Guardtime (above) is an Estonian start-up company, which mainly studies instrial network security solutions based on blockchain technology
4. Academic record and academia
holbertson school, a California software skills program, announced that it will use blockchain technology to identify academic credentials. This will ensure the authenticity of holbertson school students in course identification. If more schools adopt such transparent certificates, transcripts and diplomas, academic corruption will be greatly reced, not to mention the labor verification time and paper document cost
5. Elections
at the University of West Virginia, the student union is considering whether to use a voting platform based on blockchain technology to conct school elections. If such a platform is used, students can vote with mobile devices, and the voting results will be included in the public system, so the voting is completely safe. One student who supported this way explained that the vote "can never be modified or deleted by us - programmers, school administrators or students."
Agora voting, a Spanish software project, uses encryption technology to improve the security of online voting. Several of their systems have also been tested in Spain. Recently, the leader of this project proposed several ideas to turn bitcoin and blockchain technology into voting applications, which are far from experimental
6. Car rental and sales
later last year, visa and DocuSign announced a cooperative plan to create specific solutions for car rental by using blockchain technology. In the future, car rental can be completed in three steps of "click, sign and open". The specific operation is: customers choose the car they want to rent, and then the transaction will be uploaded to the public account of the blockchain; Then, the customer signs a lease agreement and an insurance agreement from the driver's seat, and the blockchain will upload the information in real time. It is not hard to imagine that this leasing model may also be applied to the field of car sales and car registration
7. Network communication and Internet of things
IBM and Samsung are working together to realize an idea called adept. Adept uses blockchain technology to build the pillar of decentralized Internet of things. Coindesk said that with adept, the decentralized P2P automatic telemetry system, the blockchain can become a public system for many devices, and there is no need for a central hub to mediate the communication of various devices. After removing the central control system and identifying each other, the devices can automatically communicate with each other, manage software updates, bugs, or energy consumption
other companies are also committed to integrating blockchain technology into the Internet of things platform. For example, filamen, which uses blockchain technology to build a decentralized network for sensor communication, announced that they have obtained US $5 million investment in round a financing, with the participation of Verizon ventures and Samsung ventures
8. Smart contract
a smart contract is actually a computer program that functions on the action of another object. Like ordinary computer programs, intelligent contracts are also an "If then" function, but blockchain technology realizes the automatic filling of these "contracts" without human intervention. This kind of contract may eventually replace the core business of the legal instry, that is, the business of drafting and managing contracts in the commercial and civil fields
for example, mortgage loans can be completed through blockchain technology and automatically executed every year according to the terms of the contract. Ethereum, a crowdfunding platform based on blockchain technology, not only provides decentralized applications, but also provides smart contracts. Some users have married with their smart contracts. Another company, hedgy, received $1.2 million in seed round investment from Tim Draper, Marc Benioff, boost.vc and sand hill angels earlier this year. The company uses smart contracts to build a platform for users to discuss the value of bitcoin
9. Prediction
blockchain technology may shake the whole research, analysis, consulting and prediction instry. Aug, an online crowdfunding platform, hopes to make a profit in a decentralized forecasting platform. The company said it would offer a service that looked like a gaming swap. The whole process will be decentralized, and the AUG platform will not only provide users with sports and stock gambling services, but also provide election and natural disaster gambling services. This idea actually goes beyond sports gambling and creates a "forecasting market"
10. Online music
many musicians are choosing blockchain technology to improve the fairness of online music sharing. Billboard reports that two companies are automatically solving licensing problems by paying artists directly and using smart contracts. Peertracks, which is still in its infancy, wants to create a new music streaming platform where users can pay artists directly without middleman's intervention. Peertracks also hopes to create more direct interaction between artists and users
ujo music, led by entrepreneur Phil Barry, claims that they are rebuilding the music instry on the blockchain. Ujo also hopes to solve the problem of streaming music and artist payment. In addition to streaming music, it is also expected that ujo will be able to better classify the artists and creators behind the songs by using intelligent contracts as the autonomous brain of the song list
11. Travel sharing
Uber and other travel applications seem to be on the opposite side of decentralization. This company is like a deployment center, using its algorithm to control its drivers and their charges. According to the report of blog, Israeli venture LA & # 39; Zooz wants to "go against Uber.". The company invented its own patented digital currency, which, like bitcoin, can be digitally recorded using blockchain technology. Different from the centralized network, users can call in LA & # 39; Find people with similar itinerary on zooz, and then use LA & # 39; Zooz's currency pays the taxi fare. These coins can be used for car hailing in the future. Users can get LA & # 39 as long as they allow the app to track their location; Zooz's digital currency
12. Stock trading
for many years, companies have been trying to simplify the process of stock purchase, sales and trading. Emerging blockchain technology makers believe that they can go beyond the past, realize the automation of the whole process, and improve security and efficiency. Overstock's subsidiary T & # Com wants to use blockchain technology to realize online trading of stocks. Overstock is already using blockchain technology to issue public shares, wired reported. At the same time, chain, a blockchain technology maker (mentioned above), is working with NASDAQ to realize the share trading of private companies through blockchain technology.
1. Most people don't know what a blockchain is
compared with traditional stocks, real estate, bonds, gold, etc., blockchain assets are a very abstract and virtual form of assets. Blockchain assets represented by bitcoin are a very specialized computer language and program running mode, There is no credit endorsement from any country behind it, nor does any enterprise give it securitization income, which completely depends on the mutual consensus trust between strangers. In this case, although the operation logic of decentralization has been completed, its experiment is only in the initial stage and development stage, and participating in relevant investment is actually a kind of brave adventurer behavior
2. The price of blockchain assets fluctuates violently
because there is not much support from the use level of entities, many blockchain projects are completely dependent on community operation and market speculation, so it is difficult for investors to hold blockchain assets from the perspective of value investment, which leads to frequent capital flow, and the situation of price fluctuations has become a normal. A blockchain related token can soar by 500% in a day, or fall by 90% in a few hours. This kind of drastic price fluctuation is not affordable to ordinary investors
3. The uncertainty of national policies is too great
as an underlying technology, blockchain has basically accepted its value all over the world. However, as the "companion proct" of blockchain, there are still great disputes on national policies, and with the continuous increase of digital currency trading volume, the impact on the global financial market is also increasing. At present, the daily trading volume of the whole digital currency field exceeds US $60 billion, which is comparable to the trading volume of China's Shanghai and Shenzhen stock exchanges, or the average daily trading volume of the New York Stock Exchange. It is impossible to continue to operate outside the supervision. There is a very large regulatory game cycle, and the policies of various countries in this regard may be introced one after another, The impact on the market cannot be ignored
4. All kinds of blockchain projects are good and bad
blockchain technology is originally a very basic architecture technology. At present, e to the global pursuit of funds, many project parties who have nothing to do with blockchain begin to use the concept of blockchain to design procts, And can complete the writing of the white paper of blockchain in a very short time, and then raise market funds. In this case, the technical threshold of the whole blockchain has been lowered. Many companies without the strength and willingness of blockchain development have developed the concept of blockchain purely to obtain financial support, resulting in the flooding of projects. The gap between projects is widening, but ordinary investors are difficult to identify and easy to fall into the trap
5. Currency speculation is not equal to blockchain investment
at present, there are many views that blockchain and digital currency are a whole. You can't develop blockchain technology while suppressing digital currency. I agree with this logic, but currency speculation is not the same as blockchain investment in the real sense. The thing with real investment value must be the thing with scarce supply. If any digital currency is issued, it can represent the application value of the blockchain and bring some innovation to the society. Then any blockchain technology team that can issue digital currency can issue dozens of digital currencies and change its name in a very short time. Therefore, digital currency itself has little logical relationship with blockchain assets. Blockchain projects must be a market with obvious scarcity, but digital currency does not have great scarcity. This is like saying that any Internet company can develop a chat software similar to wechat, but the chat software itself does not have much value. The real value lies in how many people participate in the chat software. Digital money is just a chat software. The current situation is that everyone is frying the software, and few people are concerned about what is on the software. p>
6. Short term overheating, easy to be used by lawless elements
the particularity of the blockchain instry is that many of the ecology has become very financial, in the whole process of operation, capital will be very concentrated, and most of the links are related to capital. From raising funds by ICO to sending tokens to investors, to online trading of exchanges, and trading of tokens by users in exchanges, the whole process is almost full of financialization. If the practitioners are not professional enough, have no self-discipline ability, and lack of supervision, then every link may be used by criminals to manipulate the market, Obtain all kinds of illegal income
In order to catch up with the next round of financial technology and digital revolution, Japan holds a very open attitude towards bitcoin and other transactions. Digital currency transactions denominated in Japanese yen occupy half of the whole legal currency trading area in the world, Japan hopes to use digital currency to revive its financial competitiveness. The United States hopes to use mainstream financial markets, such as futures and options derivatives market, to tame bitcoin and make it another powerful tool for us dollar hegemony. And China is also trying to promote sovereign cryptocurrency, one of the important purposes is to promote the internationalization of RMB. The field of digital currency and blockchain assets is likely to become the next big country's game and contention point, which will virtually increase the systematic risk to investors. It's hard to know what unexpected policies appear behind this big country's game and what impact they will bring to the whole market8. The threat of quantum computer
blockchain generates a set of self-motivated system to ensure that it can run on its own under decentralized conditions. Most of them use asymmetric encryption, and use the corresponding public key to verify the transactions signed by the private key, so as to ensure that bitcoin and other blockchain assets can only be used by legitimate owners. But quantum computer can solve the problem of asymmetric encryption. Quantum computer can calculate the private key from the public key in a few minutes. After knowing all the private keys, people with quantum computer can spend bitcoin and other digital currency at will. Of course, when the quantum computer will come out is also a problem. The digital currency protocol is constantly adding new encryption standards, but the potential threat brought by the quantum computer has to attract the attention of investors
9. There is a possibility of a big reversal in the supply and demand level
the market value of the blockchain token market has hovered around us $trillion. Although OTC funds are still pouring in, the stability and growth rate of the capital inflow are questionable. The supply of encrypted digital currency is a very embarrassing thing. From the perspective of a single digital currency, the total amount is strictly limited. For example, there are only 21 million bitcoins, but the threshold of issuing encrypted digital currency is getting lower and lower. Anyone and any organization can issue encrypted digital currency anytime and anywhere, and the supply is almost unlimited. On the other hand, the increasing transaction cost is restraining the demand side. At present, investors in the transaction link need to pay the transaction fees in the exchange, and also pay the miners' fees when transferring money. If countries begin to tax digital currency transactions in the future, it means that this market will have to bear more operating costs without generating its own profitability, If coupled with the increasing supply level, the overall market supply and demand expectations may reverse in a moment
10. Lack of legal protection for blockchain assets
it is not uncommon that global digital currency exchanges have been "hacked", and in the process of all kinds of over-the-counter and on-the-spot transactions, fraud also occurs from time to time, and the legal protection for investors is very limited. Especially for domestic investors, once they are stolen or cheated because of trading digital currency, it is almost difficult to recover effectively. Due to the lack of intermediary guarantee from banks and other levels, the security of digital currency is entirely under their own responsibility. Although this is in line with the logic of self preservation of private property, it also brings greater uncertainty to the storage and transaction of digital currency assets. Before there is no complete legal system to protect the rights and interests of personal digital currency assets, the legal security of investment in blockchain related assets is a very serious problem
in a few days, the safe also released the blockchain development plan. It seems that the whole world will be transformed by blockchain. Many people have a kind of blockchain application, which will give the currency transaction and foreign exchange transaction a false identity
blockchain has a natural anti censorship international nature in terms of asset transaction and circulation, and can freely and conveniently circulate without the constraint of traditional concurrent management. On the one hand, there is a great risk, so the safe also said that in China, only RMB can be used for pricing, and anything that may threaten this basis should be prohibited. In a short period of time, it may be difficult for blockchain to achieve anything at the level of foreign exchange transactions. The foreign exchange bureau mentioned the application scenarios of blockchain technology in cross-border trade financing and macro Prudential Management. This direction belongs to the pure technology application direction, which is less related to transactions. At present, it is also the direction that the top priority is to develop, using blockchain technology to optimize the real instry
how to optimize it? Because blockchain has the characteristics of traceability, distributed transparency, tamper proof, etc., for example, in cross-border trade, the data of related parties involved in trade are linked and opened to third parties (such as banks) with permission. In the past, enterprises may need more practical asset mortgage to borrow money from banks, Now, by associating reliable trade data on the blockchain, the bank can know the future cash flow of the enterprise, and can use the operation of the enterprise as asset mortgage to give credit. This will greatly optimize the allocation of assets
another example is the patient information in the hospital. The traditional scenario is that the data of each hospital is independent. Every time you go to a new hospital, you will be asked to do a booklet or a set of examinations. If there is a medical chain open to all hospitals and all information is recorded in this account book, you can avoid a lot of plication and simplify efficiency
it is clear that the priority is to develop blockchain technology to optimize and transform traditional instries, with the focus on the combination with the real economy. I am also very optimistic about this, but in terms of asset trading, the expectation of currency trading and foreign exchange trading should not be too high. After the excitement, it will be calm. FX technology, fxmap in Assa community
When we were young, we all played the game of throwing handkerchief. To win in the game, we should not only be quick-sighted, but also know the information at the first time, because the children with handkerchief will walk quickly by us, and then inadvertently throw the handkerchief down. But in the process of throwing handkerchief, we should not only be quick to see, but also know the information, These children will definitely pause behind us. If we can find this pause, we can seize the opportunity to seize this child
the same is true for bitcoin. Many people always think that bitcoin is a process of continuous rise and fall. As long as they buy it at a low price, they can wait for the price of bitcoin to rise. When the price of bitcoin rises to a certain extent, they can get huge wealth by selling the bitcoin in their hands. This idea is really wrong
So I think the principle of bitcoin is similar to that of losing a handkerchief. First of all, we need to know the news and seize the opportunity. Second, we need to know who has the handkerchief. Last but not least, we need to be quick in the process of losing a handkerchief, Every turn is the best time