How many times does the blockchain invest

1. blockchain mainly solves the trust and security problems of transactions, so it proposes four technological innovations to solve this problem:
(1) distributed ledger, that is, transaction bookkeeping is completed by multiple nodes distributed in different places, and each node records complete accounts, so they can participate in monitoring the legitimacy of transactions, At the same time, they can testify together
different from traditional distributed storage, the uniqueness of distributed storage of blockchain is mainly reflected in two aspects: one is that each node of blockchain stores complete data according to block chain structure, while traditional distributed storage generally stores data in multiple copies according to certain rules. Second, the storage of each node in the blockchain is independent and has the same status, which relies on the consensus mechanism to ensure the consistency of storage, while the traditional distributed storage generally synchronizes data from the central node to other backup nodes[ 8]
no single node can record the account data separately, so as to avoid the possibility that a single bookkeeper is controlled or bribed to record false accounts. In theory, unless all the nodes are destroyed, the accounts will not be lost, so as to ensure the security of the account data
(2) asymmetric encryption and authorization technology, the transaction information stored on the blockchain is public, but the account identity information is highly encrypted, which can only be accessed under the authorization of the data owner, thus ensuring the data security and personal privacy
(3) consensus mechanism is how to reach a consensus among all accounting nodes to determine the validity of a record, which is not only a means of identification, but also a means of preventing tampering. Blockchain proposes four different consensus mechanisms, which are suitable for different application scenarios and achieve a balance between efficiency and security
the consensus mechanism of blockchain has the characteristics of "the minority is subordinate to the majority" and "everyone is equal", in which "the minority is subordinate to the majority" does not completely refer to the number of nodes, but also can be the computing power, the number of shares or other characteristics that can be compared by computers“ "Everyone is equal" means that when the nodes meet the conditions, all nodes have the right to put forward the consensus results first, and then directly recognized by other nodes, and finally may become the final consensus results. Taking bitcoin as an example, the workload proof is adopted. Only when more than 51% of the accounting nodes in the whole network are controlled can a nonexistent record be forged. When there are enough nodes in the blockchain, this is basically impossible, thus eliminating the possibility of fraud.
(4) smart contract, which is based on these trusted and tamperable data, can automatically execute some pre-defined rules and terms. Take insurance as an example. If everyone's information (including medical information and risk occurrence information) is true and reliable, it is easy to carry out automatic claim settlement in some standardized insurance procts

2. The underlying logic of blockchain is to store information in a common competitive accounting mode, which can be understood as a book that records digital asset transactions and can not be tampered with by anyone without permission
blockchain is a basic digital currency technology such as bitcoin, and it is also the only technology that has been applied to realize cash at present
now that digital currency trading has been closed in China, the vitality of the old brands who used to do well in China has been seriously damaged, and some units relying on overseas have risen, such as coin an, which is now the most popular.

3. There are still many blockchain trading platforms, such as coin an, fire coin, OK and so on, which are relatively large platforms
blockchain is the core supporting technology of digital cryptocurrency system represented by bitcoin. The core advantage of blockchain technology is decentralization. It can realize point-to-point transaction, coordination and cooperation based on decentralized credit in a distributed system without mutual trust by means of data encryption, time stamp, distributed consensus and economic incentive, so as to solve the common high cost, low cost and low cost of centralized institutions Low efficiency and data storage insecurity provide solutions
the application fields of blockchain include digital currency, token, finance, anti-counterfeiting traceability, privacy protection, supply chain, entertainment, etc. with the popularity of blockchain and bitcoin, many related top domain names have been registered, which has a great impact on the domain name instry.

4. Currently known blockchain technology classification, jinwowo Group believes that it can be roughly divided into three categories:
1 - public blockchain: refers to the blockchain that anyone can read, send transactions for validity confirmation, and anyone can participate in its consensus process, so as to jointly maintain the security, transparency and tamper proof of public blockchain data
2-community blockchain: also known as alliance chain, it means that the nodes participating in the blockchain are selected in advance, and there are usually good network connections and other cooperative relationships between the nodes
3-private blockchain: the participating nodes only have a limited range, the access and use of data have strict permission management, the write permission is only in the hands of the participants, and the read permission can be opened to the outside world.

5. In my opinion, risk and security awareness must be understood. You can see whether the token issued by the blockchain project you want to invest in has been put on a large trading platform. If the token of a project is not put on the exchange or the landing trading platform is a small exchange unheard of, then investors need to be more vigilant. At present, the largest exchange in China is okex, and small trading platforms have the risk of running away. New people should never touch it. You can go directly to the official website of okex.

6. 1. If participants still believe that blockchain has great potential in the future, they can try value investment. We should choose some encrypted currencies that are already in the mainstream, because the price of head assets can still rise after the first bubble burst in the future.
2. For some digital currencies with unclear value, choose the ones you can understand and think reliable to participate moderately
in addition to investment timing, investors need to pay attention to how to choose blockchain projects with appreciation potential and how to judge whether the project parties use the blockchain concept for publicity and packaging. What kind of blockchain project to invest in
Xiaobian puts forward three judgment points:
1. Judge whether there are projects landing and practical applications, such as in the fields of right, finance and information protection that are considered the most suitable for blockchain applications
2. Whether the issued digital currency and mining are related to practical application. Many project parties have realized that blockchain must be connected with real life application scenarios, such as information authentication and transfer settlement
3. Whether blockchain system design is only concive to price speculation, rather than promoting scenario realization
not all blockchain projects and practitioners are opportunistic tactics of short-term cash out and leaving as soon as possible. In fact, there are some cases of blockchain technology application leading the world in China, and there are also domestic enterprises doing blockchain research and application landing.