Wechat circle of friends engaged in digital currency
what is blockchain
blockchain is a technical solution to maintain a reliable database collectively through centralization and distrust
generally speaking, blockchain technology refers to a way for the whole people to participate in bookkeeping. There is a database behind all the systems. You can think of the database as a big ledger. So it's very important who keeps this account book
so what's the difference between our current accounting method and blockchain
take the Internet giant companies as an example, wechat's account book is Tencent's account book, and Taobao's account book is Alibaba's account book
but in the blockchain system, everyone in the system can have the opportunity to participate in bookkeeping. If there is any data change in a certain period of time, everyone in the system can conct bookkeeping. The system will judge the person who has the fastest and best bookkeeping in this period, write the content of his records into the account book, and send the content of the account book to all other people in the system for backup. In this way, everyone in the system has a complete account book. This way, we call it blockchain technology
will not mastering blockchain be eliminated by the times
although blockchain is popular, for ordinary people, they don't need to panic and can't master this technology. In fact, it has nothing to do with us. After the implementation of blockchain development, we only need to be able to use related applications. Just like we don't need to know what is the underlying TCP / IP protocol of the Internet, we just need to enjoy the services provided by the Internet. Blockchain is more similar to the underlying technology such as TCP / IP, and will be extended to more and more instries in the future
how to apply blockchain
the most important thing of blockchain is to solve the problem of intermediary credit. In the past, it was difficult for two people who didn't know and trust each other to reach cooperation, and they had to rely on a third party. For example, in the past, there must be an institution such as a bank or Alipay.
therefore, blockchain can subvert many instries, making these instries without intermediary participation, efficient and transparent process, low cost and high data security. Therefore, if there is any demand in these three aspects, the instry will have the opportunity to use blockchain technology
what is bitcoin? Is bitcoin a blockchain
blockchain technology is the underlying technology of bitcoin. Through the blockchain technology, bitcoin is the first time for human beings to realize the mutual trust transfer behavior without the participation of any intermediary. And this system has been running autonomously and stably for many years, and there has been no problem
therefore, many people have noticed that the underlying technology may have a great mechanism, and it can be used not only in bitcoin, but also in many fields. Therefore, bitcoin technology is abstracted, which is called blockchain technology or distributed ledger technology. So from a certain point of view, bitcoin can be regarded as the first application of blockchain, and blockchain is more similar to the underlying technology such as TCP / IP, which will be extended to more and more instries in the future
what is "mining"
mining, in a narrow sense, is the "mining" in bitcoin. The operation of bitcoin adopts a mechanism called "proof of work (POW)". In order to find out who has more powerful computing power, the system will work out a mathematical problem every time. Only the computer that can solve the problem the fastest can carry out accounting. The computer that grabs the bookkeeping right will be rewarded with 25 bitcoins. This behavior is usually called "mining", and the bitcoin obtained is regarded as the reward for successful mining
broadly speaking, it is a process of bookkeeping reward, which can be used in any instry or digital currency
what is smart contract
smart contract is a kind of contract that uses computer language instead of legal language to record terms. Smart contracts can be executed automatically by a computing system. If blockchain is a database, smart contract is the application layer that can make blockchain technology applied to reality. In the traditional sense, the contract has no direct connection with the computer code to execute the content of the contract. In most cases, paper contracts are filed, while software executes contract terms written in computer code. The potential benefits of smart contracts include lower contract signing, enforcement and regulatory costs; Therefore, for many contracts related to low value transactions, this is a great rection in labor costs
Q: how to use smart contracts
if the central bank can issue legal currency through blockchain, it can also embed code into the behavior of issuing legal currency through smart contract technology, and this part of legal currency can be called "programmable currency". For example, if the Central Bank specifies that a certain part of the fund is issued to the agriculture related account, then it can write the corresponding proceres for this part of the fund, and specify that this part of the fund can only enter the agriculture related account, then this part of the fund can not be misappropriated to other accounts under any circumstances. If most currencies become "programmable currencies", then we can imagine that the financial environment they form will become "programmable finance"
what is digital currency
digital currency refers to the digitization of currency. Digital currency can be divided into two types: non cryptocurrency (e-gold, XRP) and cryptocurrency (bitcoin)
digital currency is often mistaken for virtual currency. But virtual currency refers to non real currency. For example, when you play "Three Kingdoms" (game) or "grand Voyage", you have money, and that money is virtual. Of course, the virtual money will also have its real value. For example, if you buy her / his account from another player, you can get all the virtual assets of that player, and then it will be much easier for you to continue playing
does a blockchain project need to have some kind of currency
A: No. Bitcoin itself is a payment system, so it needs a value measurement tool, so bitcoin must appear. In addition, in order to reward more people who are willing to contribute their computers to provide computing for the system, bitcoin is needed. In some private chain systems, special assets can be designed for transaction, and each node must participate
hd7990 is the current king. It is said that the electricity charge for each bitcoin mined by hd7990 is 130-140 yuan, which means that a monster card like hd7990 needs to work for about 20 days to get a bitcoin. A bitcoin may consume 300 watts of power, not counting the loss of computers
in addition to the graphics card, other hardware of the mining platform will also consume electricity. CPU / motherboard, memory, hard disk, including the power supply for the whole machine, will still need electricity because there is no 100% conversion rate. Compared with the display that can be turned off in pure standby, they have to intervene
the faster the graphics card mining speed is, the less unnecessary power consumption will be consumed for each bitcoin acquisition. In this case, the graphics card with fast computing speed often has more advantages. If a multi card platform is established, the net profit per unit time will be higher
the lower the performance of the card, the more power it consumes on average
in a word! Investment must be cautious.
digital currency fraud is basically a routine, that is, first pull you into a wechat group, and then recommend a platform for you to speculate in stocks or other digital currencies at the beginning, your income is very large, but when the latter value reaches a certain level, you can no longer withdraw cash. If you ask the other party, the other party will ask you to recharge more money to unfreeze your account, but no matter how much money you put in, your money will not come back. The members who make money in the wechat group are basically the people in the fraud Gang, and the screenshots of the income are basically forged by them. It is very likely that you are the only real member of the whole wechat group
nowadays, fraudsters are more and more high-end, not only using mobile phones, but also using the Internet for fraud. Some of their knowledge is self-taught, and some is learned from other fraudsters. After all, some fraudsters are even high intellectuals, but they are different from other high intellectuals and go astray. If we find that our circle of friends is all about money investment, then our friend may have gone astray