When did the coin source FOSS start mining
It was officially born on January 3, 2009
since 2015, the future of bitcoin has become more and more uncertain. On the one hand, bitcoin fell as much as 55.55% against RMB last year; In 2015, bitcoin fell by more than 30% against the RMB in the first half of January alone
bitcoin's "falling" reflects the "self-healing" of its value after "fanaticism" to a certain extent. According to statistics, in 2013, bitcoin rose from 1 ∶ 13.59 to 1 ∶ 731, with an annual increase of 5300%. This speculative driven inflation has affected the virtual currency property on which bitcoin relies
on the one hand, no country has defined it as a legal currency. On the other hand, in 2014, the US dollar rose significantly, and the prices of oil and bulk commodities fell correspondingly. The price trend of bitcoin is the same as that of the latter, becoming part of the asset allocation of some speculators, which highlights that its asset attribute is far greater than the monetary attribute
extended data
Security and credit risk have also become the reasons for the decline of investor confidence. Mt. GOx, once the world's largest bitcoin exchange, claimed in March last year that it had lost all its assets e to hacker attacks. Recently, it was revealed that its lost bitcoin was probably e to internal system manipulation
the regulatory environment of bitcoin is not optimistic, and Russia, Thailand and other countries have begun to implement strict control on it. In addition, the global stock market performed well last year, resulting in the diversion of bitcoin investment funds, and the crazy "mining" activities also rapidly increased the supply of bitcoin, which may lead to a trend of oversupply in the short term, leading to a sharp drop in the price of bitcoin
Bitcoin was born in 2009, and it has entered China since it appeared
extended information:
bitcoin:
bitcoin can be used to cash and can be converted into the currency of most countries. Users can use bitcoin to buy some virtual items, such as clothes, hats and equipment in online games. As long as someone accepts it, they can also use bitcoin to buy real-life items
the concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's ideas, open source software was designed and released, and P2P network was built on it. Bitcoin is a kind of P2P digital currency. Point to point transmission means a decentralized payment system
generation principle:
starting from the essence of bitcoin, the essence of bitcoin is actually a special solution generated by a bunch of complex algorithms. A special solution is one of the infinite (in fact, bitcoin is finite) solutions that can be obtained from the equations. Every particular solution can solve the equation and is unique. In the metaphor of RMB, bitcoin is the serial number of RMB. If you know the serial number of a note, you have the note. The process of mining is to constantly seek the special solution of this equation system through a huge amount of calculation. This equation system is designed to have only 21 million special solutions, so the upper limit of bitcoin is 21 million
source: bitcoin
a total of 2100W bitcoins are issued, and each block is generated for 10 minutes, and a block rewards a certain number of bitcoins. In the beginning, 50 bitcoins were awarded for each block of mining. In the future, the reward was halved for every 21000 blocks (about once every four years). Now, 12.5 bitcoins are awarded for each block generated. The generation time of each block is 10 minutes, but with the development of computer technology, now the mining calculation power is increasing, so the generation time of a block must be less than 10 minutes, which requires certain control measures to ensure this time. This measure is the difficulty of mining. If the output time of each block is less than 10 minutes, the difficulty of mining will be increased. If the output time is more than 10 minutes, the difficulty of mining will be reced. The difficulty adjustment time is 2016 blocks, that is, 2 weeks
after every 2016 blocks, all nodes will automatically adjust the mining difficulty according to a certain formula. This formula is obtained by comparing the latest time spent in 2016 blocks in this cycle with the expected time (20160 minutes, i.e. two weeks)
new difficulty = old difficulty * (time spent in the past 2016 blocks / 20160 minutes)
the differences between bitcoin and skycoin in the current stage, and why skycoin is a ship heading for the future. 1. Positioning is different. BTC's positioning is a point-to-point payment agreement. Anyone in the world can freely control their own assets anywhere, so that places without banks can enjoy services similar to banks. Now BTC's position in the blockchain instry is similar to that of gold in the financial system, anchoring other digital currencies. On the street, grab anyone and ask him if he knows blockchain? Few people have heard of it. When we talk about BTC, we all know the concept. This is where the value of BTC lies. With the increase of the number of coin holders, the number of accepted merchants and the number of transactions, the value of BTC has increased geometrically. Skycoin's positioning is decentralized and P2P Internet economy. It not only provides value transmission as a new generation of cryptocurrency, but also provides valuable services. A decentralized network service provider rewards skycoin tokens when users provide bandwidth or resources. Similarly, when users consume network resources or media, they consume skycoin tokens. As a decentralized blockchain platform, people can develop all kinds of dapps on the skycoin main chain network. 2. The original intention of BTC design is to be completely decentralized and everyone can participate. Nakamoto designed a consensus mechanism pow. After downloading the BTC account book, everyone can use their own computer to calculate the hash value and get BTC rewards. Wish is good, reality is cruel. After BTC's value was widely recognized, the price soared, attracting more people to join the mining army and opening the arms race mode. From the initial CPU mining to the present computer cluster mining, the computing power of BTC is now monopolized by the three major mines in the world, and BTC is graally gathered into the hands of a few people, and is back on the old road of centralization. Skycoin starts from design to avoid the problem that the accounting right and voting right of BTC are not separated, resulting in that the computing power is in the hands of the mining tyrant, and the code is in the hands of the code tyrant. The mining tyrant forcibly forks the BTC, and the code tyrant privatizes the technology. They do evil at will, but all the coin holders have no choice but to let fate decide. They often have to choose one of the two villains. Its consensus mechanism obelisk is independent of the creation of skycoin. If skycoin does not mine directly and cancels the block reward, the miners will have no interest, so they will not have the power to monopolize and control skycoin network. Obelisk designs a trust based mesh network. Each node will randomly connect several upstream nodes and downstream nodes to disperse the influence of nodes and avoid BTC centralization. 3. The transaction process of BTC is open with different node risks. For a new block composed of more than 2000 transaction data, all nodes can participate in mining, and only spend the most computing resources to get rewards. Nodes are randomly connected to each other, and each node transfers the most difficult block it knows to other nodes, which will then accept the chain. The node will evaluate the function to verify the received block chain more difficult, and then switch to the received block chain. The node then broadcasts its new chain to other nodes. In this way, consensus is spread through the network, and all nodes reach the same consensus. Each bitcoin node is very easy to control. An attacker who controls the router has absolute control and can arbitrarily affect the consensus result of the node. Skycoin's transaction process is closed, only between the node and its associated upstream and downstream nodes. Just like Apple's system, the closeness ensures high efficiency and good user experience. If you want to destroy skycoin, you must get a user's private key in the transaction chain, and you must join its upstream or downstream. Once joined, all subsequent actions will be broadcast, and at the same time, they will be limited in this trading chain, so they cannot be spread on a large scale. If someone violates the rules or attacks maliciously, the community will easily find the problem node, cut off the connection between the node and other upstream and downstream nodes, and minimize the harm. Conclusion: one is the underlying basic chain, which aims to become the basic digital currency. One is the application chain, which aims to build a self-sufficient ecosystem. When the infrastructure is completed, the value of the application chain will not be lower than that of the basic digital currency. One begins to deviate from the original intention of decentralization, and power is gathered into the hands of a few people; One from the beginning of design is to not repeat the mistakes, find the original heart, and achieve complete decentralization. There is a crisis of being attacked and tampered by 51% of the computing power; Let's wait and see - skycoin - a safer, faster and more futuristic digital currency.
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